Excited state dynamics of a Bodipy derivative with a twisted molecular structure: Combined experimental and theoretical studies
Abstract
The photophysical properties of a boron dipyrromethene (Bodipy, BDP) derivative (BDP-SA) in which one F atom at the BDP core was replaced by an O atom and condensed with salicylaldehyde were investigated. This compound has a twisted molecular structure and unusually low fluorescence quantum yield (1% in toluene). No intersystem crossing was observed with a nanosecond transient absorption study. The triplet state lifetime of BDP-SA was determined to be 115 μs by photosensitizing. Femtosecond transient absorption shows a structure relaxation of ∼1.5 ps for the S1 excited state. Theoretical studies show conical intersections, which are responsible for the efficient non-radiative decay of the S1 state, which has extremely weak fluorescence.
Article Details
Journal Info
The Journal of Chemical Physics
American Institute of Physics
Authors (10)
Bei Li
Sheng Liao
Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University 2 , Shantou 515063,
Jiayu Li
Xi Chen
Xue Zhang
Jianzhang Zhao
State Key Laboratory of Fine Chemicals, Frontier Science Center of Smart Materials, School of Chemical Engineering, Dalian University of Technology 1 , 2 Ling-Gong Road, Dalian 116024,
Ming-De Li
School of Physics and Optoelectronic Engineering & Guangdong Provincial Key Laboratory of Sensing Physics and System Integration Applications, Guangdong University of Technology 4 , Guangzhou 510006,
Bernhard Dick
Lehrstuhl für Physikalische Chemie, Institut für Physikalische and Theoretische Chemie, Universität Regensburg, Universitätsstr. 31 4 , D-93053 Regensburg,
Gloria Mazzone
PROMOCS Laboratory, Department of Chemistry and Chemical Technologies, University of Calabria 1 , Ponte P. Bucci, 87036 Arcavacata di Rende (CS),
Gagik G. Gurzadyan
State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis Dalian University of Technology 5 , Dalian 116024,