Excited state dynamics of a Bodipy derivative with a twisted molecular structure: Combined experimental and theoretical studies

被引：1

作者：

Li, Bei ^{[1
]}

Liao, Sheng ^{[2
,3
]}

Li, Jiayu ^{[2
,3
]}

Chen, Xi ^{[1
]}

Zhang, Xue ^{[1
]}

Zhao, Jianzhang ^{[1
]}

Li, Ming-De ^{[2
,3
]}

Dick, Bernhard ^{[4
]}

Mazzone, Gloria ^{[5
]}

Gurzadyan, Gagik G. ^{[6
]}

机构：

[1] Dalian Univ Technol, Frontier Sci Ctr Smart Mat, Sch Chem Engn, State Key Lab Fine Chem, E208 West Campus,2 Ling Gong Rd, Dalian 116024, Peoples R China

[2] Shantou Univ, Dept Chem, Shantou 515063, Peoples R China

[3] Shantou Univ, Key Lab Preparat & Applicat Ordered Struct Mat Gua, Shantou 515063, Peoples R China

[4] Univ Regensburg, Inst Phys & Theoret Chem, Lehrstuhl Phys Chem, D-93053 Regensburg, Germany

[5] Univ Calabria, Dept Chem & Chem Technol, I-87036 Arcavacata Di Rende, Italy

[6] Dalian Univ Technol, Inst Artificial Photosynth, State Key Lab Fine Chem, Dalian 116024, Peoples R China

来源：

JOURNAL OF CHEMICAL PHYSICS | 2025年 / 162卷 / 05期

基金：

中国博士后科学基金;

关键词：

DESIGN; SOLVENT; SINGLET; PHOTOSENSITIZERS; PHOTODYNAMICS; SELECTIVITY; INDICATORS; SENSORS; DYES;

D O I：

10.1063/5.0245843

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 mu s by photosensitizing. Femtosecond transient absorption shows a structure relaxation of similar to 1.5 ps for the S-1 excited state. Theoretical studies show conical intersections, which are responsible for the efficient non-radiative decay of the S-1 state, which has extremely weak fluorescence.

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页数：11

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