S2 emission from chemically modified BODIPYs

Dae Won Cho; Mamoru Fujitsuka; Jung Ho Ryu; Myoung Hee Lee; Hwan Kyu Kim; Tetsuro Majima; Chan Im

doi:10.1039/C2CC30569K

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S₂ emission from chemically modified BODIPYs†‡

Dae Won Cho,*^a Mamoru Fujitsuka,^b Jung Ho Ryu,^c Myoung Hee Lee,^a Hwan Kyu Kim,^c Tetsuro Majima^bc and Chan Im^a

Author affiliations

* Corresponding authors

^a Konkuk University–Fraunhofer ISE Next Generation Solar Cell Research Center, Konkuk University, Seoul 143-701, Korea
E-mail: dwcho@konkuk.ac.kr
Fax: +82 2 2201 0407
Tel: +82 2 450 0406

^b Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Osaka 567-0047, Ibaraki, Japan

^c Department of Advanced Materials Chemistry and WCU Center for Next Generation Photovoltaic Systems, Korea University, Chungnam 339-700, Jochiwon, Korea

Abstract

Novel boron dipyrromethene (BODIPY) derivatives having significant absorption and emission in the longer wavelength region were synthesized. BODIPY showed anomalous S₂ emission from the second excited (S₂) state at shorter wavelength. The photodynamics of the S₂ state was investigated by fluorescence up-conversion and transient absorption spectroscopic measurements. The decay time of the S₂ emission was dependent on the internal conversion and the intersystem crossing process. The assignments of transitions were supported by a theoretical calculation based on the time-dependent density functional theory.

This article is part of the themed collection: Porphyrins & Phthalocyanines

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Article information

DOI: https://doi.org/10.1039/C2CC30569K
Article type: Communication
Submitted: 26 Jan 2012
Accepted: 08 Feb 2012
First published: 09 Feb 2012

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Chem. Commun., 2012,48, 3424-3426

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S₂ emission from chemically modified BODIPYs

D. W. Cho, M. Fujitsuka, J. H. Ryu, M. H. Lee, H. K. Kim, T. Majima and C. Im, Chem. Commun., 2012, 48, 3424 DOI: 10.1039/C2CC30569K

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