1992.3 Faculty of Engineering, Shizuoka University (BS)
1994.3 Garaduate School of Engineering, Shizuoka University (MS)
1997.3 Garaduate School of Engineering, Osaka University (Ph.D.)

1994.4 - 1999.11 New Japan Chemical Co. Ltd (Researcher)
1999.12 - 2005.3 Graduate School of Engineering, Osaka University (Assist.Professor and Campus lecturer)
2005.4 - 2010.3 Garaduate School of Materials Science, Nara Institute of Science and Technology (Assoc. Professor)
2010.4 - present Gaduate School of Engineering, Hokkaido University (Professor)
2017.4 - present Advisor to the President, Hokkaido University

1999.6 Lecture Award to attend meeting of Chemical Society of Japan (CSJ)
2004.5 Young Award of Rare Earth Society of Japan
2006.9 The JPA (Japanese Photochemistry Association) Award for Young photochemists
2010.3 Academic Awards of NAIST in 2009
2013.9 The JPA (Japanese Photochemistry Association) Award
2014.3 The CSJ (The Chemical Society of Japan) Award for Creative Work
2016.6 The ISJ (Imaging Society of Japan) Research Award of Konica Minolta Science and Technology Foundation
2017.4 Award of the Minister of Education, Culture, Sports, Science and Technology (MEXT), Japan
2021.5 Award of Rare Earth Society of Japan

1) Development of luminescent metal complexes based on the photophysical chemistry
2) Preparation and photophysical analysis of semiconductor nanoparticles
3) Fabrication of photonic devices using luminescent metal complexes and nanoparticles

see http://www.eng.hokudai.ac.jp/labo/amc/en/activity_e.html

(Total citation numbers: 10805 times (306 papers) at 2025)

1) Y. Hasegawa, Y. Kimura, K. Murakoshi, Y. Wada, T. Yamanaka, J. Kim, N. Nakashima and S. Yanagida
Enhanced emission of duterated tris(hexafluoroacetylacetonato)neodymium(III) complex in solution by suppresion of radiationless transition via vibrational excitation
J. Phys. Chem. 100, 10201 (1996). Cited 183 times

2) Y. Hasegawa, T. Ohkubo, K. Sogabe, Y. Kawamura, Y. Wada, N. Nakashima and S. Yanagida
Luminescence of novel neodymium sulfonylaminate in organic media
Angew. Chem., Int. Ed. 39, 357 (2000). Cited 195 times

3) Y. Wada, T. Okubo, M. Ryo, T. Nakazawa, Y. Hasegawa and S. Yanagida
High efficiency near-IR emission of Nd(III) based on low-vibrational environment in cages of nano-sized zeolites
J. Am. Chem. Soc. 122, 8583 (2000). Cited 146 times

4) Y. Hasegawa, S. Thongchant, Y. Wada, H. Tanaka, T. Kawai, T. Sakata, H. Mori and S. Yanagida
Enhaced luminescence and photomagnetic properties of surface-modified EuO nanocrystals
Angew. Chem., Int. Ed. 41, 2073 (2002). Cited 85 times

5) Y. Hasegawa, Y. Wada, S. Yanagida,
Strategies for designing of luminescent lanthanide(III) complexes and their photonic applications
J. Photochem. Photobio. C Photochem. Rev.5, 183-189 (2004).Cited 334 times

6) Y. Hasegawa, T. Adachi, A. Tanaka, M. Afzaal, P. O'Brien, T. Doi, Y. Hinatsu, K. Fujita, K. Tanaka and T. Kawai
Remarkable magneto-optical properties of europium selenaide nanoparticles with wide energy gap
J. Am. Chem. Soc. 130, 5710 (2008). Cited 84 times

7) Y. Hasegawa, M. Maeda, T. Nakanishi, Y. Doi, Y. Hinatsu, K. Fujita, K. Tanaka, H. Koizumi, K. Fushimi
Effective Optical Faraday Rotations of Semiconductor EuS Nanocrystals with Paramagnetic Transition Metal Ions
J. Am. Chem. Soc. 135, 2659-2666 (2013). Cited 19 times

8) K. Miyata, Y. Konno, T. Nakanishi, A. Kobayashi, M. Kato, K. Fushimi, Y. Hasegawa, Chameleon Luminophore for Sensing Temperatures: Control of Metal-to-Metal and Energy Back Transfer in Lanthanide Coordination Polymers
Angew. Chem. Int. Ed. 52, 6413-6416 (2013). Cited 324 times

9) Y. Hirai, T. Nakanishi, Y. Kitagawa, K.i Fushimi, T. Seki, H. Ito, Y. Hasegawa,
Luminescent EuIII coordination zippers linked with thiophene-based bridges,
Angew. Chem. Int. Ed. 55, 12059-12062 (2016). Cited 45 times

10) Y. Hirai, T. Nakanishi, Y.Kitagawa, K. Fushimi, T. Seki, H. Ito, Y. Hasegawa
Triboluminescence of Lanthanide Coordination Polymers with Face-to-Face Arranged Substituents,
Angew. Chem. Int. Ed. 56, 7171-7175 (2017). Cited 62 times

11) P. P. Ferreira da Rosa, Y. Kitagawa, S. Shoji, H. Oyama, K. Imaeda, N. Nakayama, K. Fushimi, H. Uekusa, K. Ueno, H. Goto, Y. Hasegawa
Preparation of photonic molecular trains via soft-crystal polymerization of lanthanide complexes,
Nature commun., 13, 3660 (2022). Cited 8 times

12) M. Tsurui, R. Takizawa, Y. Kitagawa, M. Wang, M. Kobayashi, T. Taketsugu, Y. Hasegawa,
Chiral Tetrakis Eu(III) Complexes with Ammonium Cations for Improved Circularly Polarized Luminescence,
Angew. Chem. Int. Ed.e202405584 (2024). Cited 16 times

1) Y. Hasegawa, H. Kawai, K. Nakamura, N. Yasuda, Y. Wada and S. Yanagida, "Molecular design of luminescent Eu(III) complexes as lanthanide lasing medium and their optical properties,” Rare Earths ’04 in Nara, Japan (Nara), 2004, Abstr. No. FI-05.

2) Y. Hasegawa, “Radiative process control of asymmetric Eu(III) complexes for lanthanide lasing medium,” Pacifichem 2005, USA (Hawaii), Abstr. No. 153046, 2005.

3) Y. Hasegawa, “Luminescent polymer containing Eu(III) complex as lanthanide(III) lasing medium,” GIST/NAIST Joint Symposium on Advanced Materials, Nara institute of Science and Technology, Japan (Nara), 2006.

4) Y. Hasegawa, “Polymer thin films containing asymmetric Eu(III) complexes for lanthanide lasing medium,” the 1st International Symposium on Luminescent Lanthanide Complexes (KISLLAM 2006), Hannam University, Korea (Daejeon), 2006.

5) Y. Hasegawa, “Brilliant materials constructed by rare earth compounds with organic molecules” National Academies of Sciences & Engineering and Japan Society for the Promotion of Science (JSPS), 10th Annual JAPANESE-AMERICAN FRONTIERS OF SCIENCE SYMPOSIUM (JAFoS), Japan (Kanagawa), 2007.

6) Y. Hasegawa, “Strategies for the design of luminescent lanthanide complexes”, Global COE Program “Center for Electronic Devices Innovation” and Global seminar “Recent Development of Organic Devices and Materials (I)”, Japan (Osaka), 2008.

7) Y. Hasegawa, “Strong luminescent polymer containing asymmetric Eu(III) Complexes,” Seminar of center for organic devices and advanced materials, Kyungsung University, Korea (Busan), 2008.

8) Y. Hasegawa, “Luminescent polymer containing lanthanide(III) complexes,” 2nd International Symposium on Manipulation of Advanced Smart Materials (ISMAM2008), Japan (Hyogo), 2008.

9) Y. Hasegawa, “Luminescence modulation in lanthanide(III) complex by coordination control of organic ligands,” Asian International Symposium, 3F5-42, Chemical Society of Japan, Japan (Chiba), 2009.

10) Y. Hasegawa, “Emission quantum yield measurements of luminescent lanthanide(III) complexes with narrow emission bands,” 18th International Symposium on the Photochemistry and Photophysics of Coordination Compounds (ISPPCC), Japan (Sapporo), 2009.

11) Y. Hasegawa, “Brilliant Lanthanide Phosphors composed of Asymmetric Coordination Structures, “ International Symposium for Phosphor Materials 2009 in Niigata (Phosphor Safari), Japan (Niigata), 2009.

12) Y. Hasegawa, “Strategies for the Design of Strong Luminescent Lanthanide Complexes and Their Photonic Applications,” International Meeting on Interdiciplinary Chemistry 2009 at Ikaho, Japan (Gunma), 2009.

13) Y. Hasegawa, “Characteristic Structures and Photophysical Properties of Europium(III) Complexes with Phosphine Oxides, Asian International Symposium”, Chemical Society of Japan, Japan (Chiba), 2010. 3C4-38.

14) Y. Hasegawa, “Luminescent Eu(III) complexes with asymmetric nine-coordination structures”, International Conference on Frontier Photoscience and Functional Materials (ICFPFM), Korea University (Sejoung), June 3-5, 2010.

15) Y. Hasegawa, T. Nakagawa, T. Kawai, "Luminescent lanthanide complexes with photo-switching units", First International Conference on Luminescence of Lanthanides (ICLL-1), Ukraine (Odessa), September 5-9, 2010.

16) Y. Hasegawa, “Europium chalcogenide nanocrystals with photo-magnetic properties”, The 7th Korea-Japan symposium on frontier photoscience 2010 (KJFP2010), Iner-Burgo Hotel (Daegu, Korea) , October 23-26, 2010, IL-21.

17) Y. Hasegawa, "Strong-luminescent materials containing asymmetric Eu(III) complexes", 17th Regional Symposium on Chemical Engineering (RSCE2010), Bangkok, Tailand, 2010, keynote lecture 4. Nobember 21-22.

18) Y. Hasegawa, Enhanced luminescence of asymmetric lanthanide complexes, Nagoya Univ.-Tshinghua Univ.-Toyota Motor Corp.-Hokkaido Univ.-Univ.Electron.Sci.Tech.China Joint Symposium, p. 34 (Univ.Electron.Sci.Tech.China, Chengdu, China).

19) Y. Hasegawa; Lanthanide complexes with remarkable asymmetric dodecahedron structure, 19th International SPACC symposium, The society of pure and applied coordination chemistry (SPACC), Hokkaido Univ., L01, 2012.8.3-4 Plenary Lecture.

20) Y. Hasegawa; Brilliant Red-phosphors composed of of Eu(III) complexes with asymmetric coordination structures, KJF International Conference on organic Materials for Electronics and Photonics, Tohoku University, Sendai, IL3 Invited lecture 2012

21) Y. Hasegawa; Luminescence and thermo-sensing properties of asymmetric lanthanide complexes, 3rd Japanese-german Joint Seminar Molecular Imaging Tehnology for Interdisciplinary Research, JAXA Chofu Aerospace Center, Tokyo. Keynote Lecture. 2012

22) 2012.6-7 Invited lecture: Y. Hasegawa, Strong luminescent organo-phosphors composed of lanthanide ions and phosphine oxides, Challenges in Advanced Chemistry of Asia, 2012 HU-NU-SNU-NIMS/MANA Joint Symposium, Hokkaido Univ. O-07.

23) 2013.6.24 Invited lecture: Y. Hasegawa, Luminescent lanthanide polymers for future phoytonic applications, National Taiwan University (Taipei).

24) 2013.11.25-27 Invited lecture: Y. Hasegawa; Remarkable luminescence of lanthanide coordination polymers, 2013 Korea-Japan Symposium on Frontier Photoscience (2013 KJFP), Seoul National University (Korea), IL-18. v25) 2013.12.12 Y. Hasegawa, Effective Faraday Rotation of EuS Nanocrystals with Paramagnetic Metal Ions, Nagoya Univ.-Tsinhghua Univ.-Toyota Motor Corp.-Hokkaido Univ-.Guangxi Univ.Joint Symposium (NTTH sympo.), Guangxi Univ, Nanning (China).

26) 2014.7.21 Invited lecture: Y. Hasegawa: Enhanced magneto-optical properties of EuS-Au nano-aggregates, Nagoya Univ.-Tsinghua Univ.-Toyota Motor Corp.-Hokkaido Univ. Joint Symposium (NTTH), Sapporo, IL-02.

27) 2015.4.23-25 Invited lecture: Y. Hasegawa, : Lanthanide coordination polymers with photo-functional properties, International conference on Science, Technology and Applications of Rare Earths (ICSTAR 2015), Kerala state (India). v28) 2015.5.18-22 Invited lecture: Y. Hasegawa, : Lanthanide Coordination Polymers with Characteristic Luminescence Properties, US-Japan Workshop on Advances in Organic/Inorganic Hybrid Materials 2015, Himeji Japan. v29) 2015.6.17-19 Invited lecture: Y. Hasegawa, : Brilliant Lanthanide Coordination Polymers for Full-color Imaging Appication, 1st International Conference on Advanced Imaging, National Center of Science, Tokyo, JAPAN.

30) 2015.6.26-28 Invited lecture:. Hasegawa; Lanthanide coordination polymers: control of their characteristic structures, The 11th Korea-Japan Symposium on Frontier Photoscience (KJFP 2015), Bareve Hotel, Jeju, Korea, IL05.

31) 2015.7.27-30 Invited lecture: Y. Hasegawa, Luminescent Lanthanide Coordination Polymers for Photonic Applications, Phosphor Safari 2015 (International Symposium on Phosphor Materials 2015 in Niigata), MEDIA SHIP (Niigata), Japan.

32) 2017.1.18-19 Invited lecture: Y. Hasegawa, Three-dimensional coordination polymers composed of luminescent lanthanide element blocks, The 2nd International Symposium on Polymeric Materials Based on Element-Blocks, Kyoto Institute of Technology, IL-19.

33) 2016.9.8-10 Invited lecture: Y. Hasegawa, Lanthanide coordination polymers with characteristic luminescence, The 1st Japan-Australia joint symposium on coordination chemistry, Fukuoka Univ. (Fukuoka), JL-14.

34) 2016.6.5-10 Invited lecture: Y. Hasegawa; lanthanide coordination nanoparticles for novel luminescent materials, Rare Earths 2016, Hokkaido University, Sapporo, Hokkaido, Japan, I05-04.

35) 2017.7.12-14 Invited lecture: Y. Hasegawa, Zig-Zag and two-dimensional Eu(III) coordination polymers with effective phoptoluminescence properties, Nagoya Univ.-Tsinghua Univ.-Toyota Motor Corp.-Hokkaido Univ. Joint symposium (NTTH), IL-05, Takayama, Gifu.

36) 2018. 6.4 Invited lecture: Y.Hasegawa, Introduction of strong luminescent coordination polymers, 2018 NTU-HIJoint Materials Science Workshop, National Taiwan University, Taipei, Taiwan.

37) 2018. 8.1-8.4.　Invited talk, Y.Hasegawa, Luminescent dinuclear Eu(III)-Tb(III) complex with LMCT band for single-molecular thermosensor, 43rd International Conference on Coordination Cgemistry (ICCC), Sendai, S06.

38) 2018. 9.3-6.　Keynote lecture, Y.Hasegawa, Luminescent Eu(III) coordination polymers for efficient electroluminescence, 10th International conference on f-elements (ICFE10), (EPFL, Lausanne), KL-8-1.

39) 2018.11.12-14. Invited lecture: Y. Hasegawa, Europium coordination polymers for optical devices, 2018 Nankai International Symposium on Advanced Materials, （Nankai university, Tianjin, China).

40) 2018.12.4-7. Invited lecture: Y. Hasegawa, Lanthanide coordination polymers with strong luminescent and photo-functional properties, The 12th SPSJ International Polymer Conference (IPC2018), Interenational Conference Center Hiroshima, Hiroshima, Japan)7G10IL.

41) 2018.12.16-20. Invited lecture: Y. Hasegawa, Luminescent Eu(III) coordination polymers for organic EL devices, 10th Asian Photochemistry Conference (Haward Civil Service International House, Taipei, Taiwan).

42) 2019.1.21-22. Invited lecture: Y. Hasegawa, LanthanideCoordination polymers for luminescent molecular materials, Hokkaido Univ & Peking Univ. Joint Symposium 2019 (Hokkaido Univ., Sapporo, Japan).

43) 2019.5.23-24. Invited lecture: Y. Hasegawa, Eu(III) and Tb(III) Coordination polymers with strong luminerscence and photo-functional properties, International Conference on Photocatalysis and Photoenergy 2019 (ICoPP2019), Sondgo ConvensiA (Incheon, Korea), CH II-15.

44) 2019.7.28-30. Invited lecture: Y. Hasegawa, Lanthanide coordination polymer for EL devices, Nagoya Univ.-Tshinghua Univ.-Toyota Motor Corp.-Hokkaido Univ. Joint Symposium,-materials Science and nanotechnology for the 21st century, Hakodate (hakodate, Japan), IL-06.

45) 2019.8.22-24. Invited lecture: Y. Hasegawa, Luminescent Polymer Films for Plant Growth, The 8th Chungbuk National Univ.-Hokkaido Univ. Joint Symposium on Advanced Engineering, Chungbuk National Univ (Cheongju, Korea). v46) 2023. 7.17-20. Invited lecture, Y. Hasegawa, Hard and soft lantahnide coordination polymers for future luminescent materials, The 31st International conference on Photochemistry (ICP2023), Sapporo Park Hotel, S9-01-IL.

47) 2024.7.11. Invited lecture：Y. Hasegawa, Hard and soft lanthanide coordination materials for future advanced luminophores, WPI-SKCM² & WPI-ICReDD Joint Research Symposium (Sapporo).

48) 2024.7.28-8.2. Invited lecture：Y. Hasegawa, HARD AND SOFT LANTHANIDE COORDINATION POLYMERS AND AGGREGATES FOR PHOTO-FUNCTIONAL MATERIALS, 45th International Conference on Coordinatioon Chemistry 2024(ICCC2024) Colorado state university (Fort Collins) USA.

49) 2025.12.3-4. Invited lecture, Y. Hasegawa, Environmental sensing system using lanthanide(III) aggregates in water media, 5th International Symposium on Photofunctional Chemistry of Complex Systems (ISPCCS2025), Royal Kona Resort (Hawaii).

50) 2025.12.15-16. Invited lecture, Y. Hasegawa, Luminescence-changeable lanthanide-mixed coordination polymers for future material science, Pacifichem2025 Symposium #ING024 (Hawaii).

 

化学も大好きですが、ここでは化学以外の趣味を紹介します。

お酒を楽しむ

ビール、ウイスキーをよく飲みます。
日本酒も好きです。みんなで楽しくお話しながら飲んだり、一人でじっくりお酒を味わうのもいいですね。
「酒は心の潤滑油」

音楽（シャズ、ボサノバ、洋楽ロック＆ポップス）

昔はギターも引いていました。好きなアーティストは、
ジャズ：オスカー・ピーターソンなど
ボサノバ：ジョビン、セルジオなど
洋楽ロック＆ポップス：ペットショップボーイズなど
ローリングストーンズのコンサートを見るために、はるかロンドンまで行ったことがあります。

手品

トランプを使った手品をやります。いろいろな技を修行中です。

山

夏山登りやスキーも大好きです。アウトドア（バーベQ）も楽しいですよね。

SF

SF小説やSF映画マニアです。宇宙もの、タイムトラベルもの、サイバーもの、バイオもの、すべて好きです。

1992.3 Faculty of Engineering, Shizuoka University (BS)
1994.3 Garaduate School of Engineering, Shizuoka University (MS)
1997.3 Garaduate School of Engineering, Osaka University (Ph.D.)

1994.4 - 1999.11 New Japan Chemical Co. Ltd (Researcher)
1999.12 - 2005.3 Graduate School of Engineering, Osaka University (Assist.Professor and Campus lecturer)
2005.4 - 2010.3 Garaduate School of Materials Science, Nara Institute of Science and Technology (Assoc. Professor)
2010 - present Gaduate School of Engineering, Hokkaido University (Professor)

1999.6 Lecture Award to attend meeting of Chemical Society of Japan (CSJ)
2004.5 Young Award of Rare Earth Society of Japan
2006.9 The Japanese Photochemistry Association Prize for Young Scientist in 2006
2010.3 Academic Awards of NAIST in 2009

1) Development of luminescent metal complexes based on the photophysical chemitry
2) Preparation and photophysical analysis of semiconductor nanoparticles
3) Fabrication of photonic devices using luminescent metal cimplexes and nanoparticles

1) Y. Hasegawa, Y. Kimura, K. Murakoshi, Y. Wada, T. Yamanaka, J. Kim, N. Nakashima and S. Yanagida, Enhanced emission of duterated tris(hexafluoroacetylacetonato)neodymium(III) complex in solution by suppresion of radiationless transition via vibrational excitation,
J. Phys. Chem. 100, 10201 (1996). Cited 89 times
2) Y. Hasegawa, T. Ohkubo, K. Sogabe, Y. Kawamura, Y. Wada, N. Nakashima and S. Yanagida, Luminescence of novel neodymium sulfonylaminate in organic media
Angew. Chem., Int. Ed. 39, 357 (2000). Cited 124 times
3) Y. Wada, T. Okubo, M. Ryo, T. Nakazawa, Y. Hasegawa and S. Yanagida, High efficiency near-IR emission of Nd(III) based on low-vibrational environment in cages of nano-sized zeolites
J. Am. Chem. Soc. 122, 8583 (2000). Cited 90 times
4) Y. Hasegawa, S. Thongchant, Y. Wada, H. Tanaka, T. Kawai, T. Sakata, H. Mori and S. Yanagida, Enhaced luminescence and photomagnetic properties of surface-modified EuO nanocrystals
Angew. Chem., Int. Ed. 41, 2073 (2002). Cited 36 times
5) Y. Hasegawa, M. Yamamuro, Y. Wada, N. Kanehisa, Kai and S. Yanagida, Luminescent polymer containing the Eu(III) complex having fast radiation rate and high emission quantum efficiency
J. Phys. Chem. A 107, 1697 (2003). Cited 121 times
6) Y. Hasegawa, Y. Wada and S. Yanagida, Strategies for designing of luminescent lanthanide(III) complexes and their photonic applications
J. Photochem. Photobio. C Photochem. Rev. 5, 183 (2004). Cited 91 times
7) Y. Hasegawa, M. Afzaal, P. O'Brien, Y. Wada and S. Yanagida, A novel method for synthesizing EuS nanocrystals from single-source precursor under white LED irradiation
Chem. Commun. 14, 242 (2005). Cited 20 times
8) T. Kataoka, Y. Tsukahara, Y. Hasegawa and Y. Wada, Size-controlled synthesis of quantum-sized EuS nanoparticles and tuning of their Faraday rotation peak
Chem. Commun. 14, 6038 (2005).
9) Y. Hasegawa, T. Adachi, A. Tanaka, M. Afzaal, P. O'Brien, T. Doi, Y. Hinatsu, K. Fujita, K. Tanaka and T. Kawai, Remarkable magneto-optical properties of europium selenaide nanoparticles with wide energy gap
J. Am. Chem. Soc. 130, 5710 (2008). Cited 23 times
10) T. Nakagawa, Y. Hasegawa and T. Kawai, Wavelength-divided nondestructive readout capability in luminescence modulation of a photoresponsive lanthanide(III) complex
Chem. Commun. 37, 5630 (2009).

1) Y. Hasegawa, H. Kawai, K. Nakamura, N. Yasuda, Y. Wada and S. Yanagida, Moleculaer design of luminescent Eu(III) complexes as lanthanide lasing medium and their optical properties, Rare Earths '04, Japan (NARA), 2004, Abst. No. FI-05.
2) Y. Hasegawa, Radiative process control of asymmetric Eu(III) complexes for lanthanide lasing medium, Pacifichem 2005, USA (Hawaii), 2005, Abst. No. 153046.
3) Y, Hasegawa, Luminscent polymer containing Eu(III) complexes as lanthanide lasing medium, GIST/NAIST Joint symposium on Advanced Materials, Japan (NARA), 2006.
4) Y. Hasegawa, Polymer thin films containing symmetric Eu(III) complexes for lanthanide lasing medium, The 1st International Symposium on Luminescent Lanathanide Complexes (KISLLAM 2006), Korea (Daejeon), 2006.
5) Y. Hasegawa, Brilliant meterials constructed by rare-earth compounds with organic molecules, National Academics of Science & Engineering (NAS) and Japan Society for the Promotion of Science (JSPS), 10th annual Japanese-American Frontiers of Scinece Symposium (JAFoS), japan (Kanagawa), 2007.
6) Y. Hasegawa, Strategies for the design of luminescent lanthanide complexes, Global COE Program Center for Electronic Devices Innovation and Global seminar for Recent Development of Organic Devices and materials (I), Japan (Osaka) 2008.
7) Y. Hasegawa, Luminescent Polymer containing lanthanide complexes, 2nd International Symposium on Manipulation of Advanced Smart Materials (ISMAM2008), Japan (Hyogo), 2008.
8) Y. Hasegawa, Luminescence modulation in lanthanide(III) complex by coordination control of organic ligands, Asian International Symposium in Chemical Society of Japan, Japan (Chiba) 2009, Abst. No. 3F5-42.
9) Y. Hasegawa, Emission quantum yield measurements of luminescent lanthanide(III) complexes with narrow emission bands, 18th International Symposium on the photochemistry and Photophysics of coordination compounds (ISPPCC), Japan (Sapporo), 2009.
10) Y. Hasegawa, Brilliant Lantahnide Phosphors composed of Asymmetric Coordination Structures, International Symposium for Phosphor Materials 2009 in Niigata (Phosphor Safari), Japan (Niigata), 2009.
11) Y. Hasegawa, Characteristic Structures and Photophysical Properties of Europium(III) Complexes with Phosphine Oxides, Asian International Symposium in Chemical Society of Japan, Japan (Osaka) 2010, Abst. No. 3C4-38.
12) Y. Hasegawa, Luminescence Eu(III) complexes with asymmetric nide-coordination structures, International conference on frontier photoscience and functional materials (ICFPFM), Korea University (Sejoung), June 3-5, 2010.
13) Y. Hasegawa, T. Nakagawa, T. Kawai, "Luminescent lanthanide complexes with photo-switching units", First International Conference on Luminescence of Lanthanides (ICLL-1), Ukraine (Odessa), September 5-9, 2010.
14) Y. Hasegawa, "Europium chalcogenide nanocrystals with photo-magnetic properties", The 7th Korea-Japan Symposium on Frontier Photoscience 2010 (KJFP2010), Daegu, Korea, 2010, IL-21.
15) Y. Hasegawa, "Strong-luminescent materials containing asymmetric Eu(III) complexes", 17th Regional Symposium on Chemical Engineering (RSCE2010), Bangkok, Tailand, 2010, keynote lecture 4.