Hetero Bodipy-dimers as heavy atom-free triplet photosensitizers showing a long-lived triplet excited state for triplet–triplet annihilation upconversion

2013 ◽  
Vol 49 (79) ◽  
pp. 9009 ◽  
Author(s):  
Wanhua Wu ◽  
Xiaoneng Cui ◽  
Jianzhang Zhao
Keyword(s):  
Excited State ◽  
Heavy Atom ◽  
Triplet Excited State ◽  
Triplet Triplet Annihilation

scholarly journals Orthogonally Aligned Cyclic BODIPY Arrays with Long-lived Triplet Excited States as Efficient Heavy-Atom-Free Photosensitizers

2021 ◽  
Author(s):  
Zhaoyang Zhu ◽  
Xue Zhang ◽  
Xing Guo ◽  
Qing-Hua Wu ◽  
Zhongxin Li ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited State ◽  
Excited States ◽  
Heavy Atom ◽  
Triplet Excited State ◽  
Transfer Processes ◽  
Excited State Lifetimes ◽  
Triplet Excited States

Photosensitizers with long triplet excited state lifetimes are key to their efficient electron transfer or energy transfer processes. Herein, we report a novel class of cyclic trimeric BODIPY arrays which...

scholarly journals Control of triplet state generation in heavy atom-free BODIPY–anthracene dyads by media polarity and structural factors

2018 ◽  
Vol 20 (12) ◽  
pp. 8016-8031 ◽  
Author(s):  
Mikhail A. Filatov ◽  
Safakath Karuthedath ◽  
Pavel M. Polestshuk ◽  
Susan Callaghan ◽  
Keith J. Flanagan ◽  
...  
Keyword(s):  
Excited State ◽  
Triplet State ◽  
State Formation ◽  
Heavy Atom ◽  
Molecular Rotation ◽  
Structural Factors ◽  
Triplet Excited State ◽  
State Generation

Heavy atom-free BODIPY–anthracene dyads show triplet excited state formation via PeT, controlled by molecular rotation and environmental polarity.

Triplet excited state of diiodoBOPHY derivatives: preparation, study of photophysical properties and application in triplet–triplet annihilation upconversion

2016 ◽  
Vol 4 (8) ◽  
pp. 1623-1632 ◽  
Author(s):  
Caishun Zhang ◽  
Jianzhang Zhao
Keyword(s):  
Excited State ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Photophysical Properties ◽  
Transient Absorption Spectroscopy ◽  
Triplet Excited State ◽  
Triplet Triplet Annihilation

A pyrrole-BF2-based chromophore (BOPHY) was used for the preparation of triplet photosensitizers and the photophysical properties were studied using transient absorption spectroscopy.

Triplet Excited State of BODIPY Accessed by Charge Recombination and Its Application in Triplet–Triplet Annihilation Upconversion

2017 ◽  
Vol 121 (40) ◽  
pp. 7550-7564 ◽  
Author(s):  
Kepeng Chen ◽  
Wenbo Yang ◽  
Zhijia Wang ◽  
Alessandro Iagatti ◽  
Laura Bussotti ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Recombination ◽  
Triplet Excited State ◽  
Triplet Triplet Annihilation

scholarly journals Broadband Visible Light-Absorbing [70]Fullerene-BODIPY-Triphenylamine Triad: Synthesis and Application as Heavy Atom-Free Organic Triplet Photosensitizer for Photooxidation

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1243
Author(s):  
San-E Zhu ◽  
Jian-Hui Zhang ◽  
Yu Gong ◽  
Li-Feng Dou ◽  
Li-Hua Mao ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Chemical Sensor ◽  
Heavy Atom ◽  
Visible Region ◽  
Intersystem Crossing ◽  
Triplet Excited State ◽  
Efficient Energy Transfer ◽  
Uv Visible ◽  
The Individual

A broadband visible light-absorbing [70]fullerene-BODIPY-triphenylamine triad (C70-B-T) has been synthesized and applied as a heavy atom-free organic triplet photosensitizer for photooxidation. By attaching two triphenylmethyl amine units (TPAs) to the π-core of BODIPY via ethynyl linkers, the absorption range of the antenna is extended to 700 nm with a peak at 600 nm. Thus, the absorption spectrum of C70-B-T almost covers the entire UV–visible region (270–700 nm). The photophysical processes are investigated by means of steady-state and transient spectroscopies. Upon photoexcitation at 339 nm, an efficient energy transfer (ET) from TPA to BODIPY occurs both in C70-B-T and B-T, resulting in the appearance of the BODIPY emission at 664 nm. Direct or indirect (via ET) excitation of the BODIPY-part of C70-B-T is followed by photoinduced ET from the antenna to C70, thus the singlet excited state of C70 (1C70*) is populated. Subsequently, the triplet excited state of C70 (3C70*) is produced via the intrinsic intersystem crossing of C70. The photooxidation ability of C70-B-T was studied using 1,5-dihydroxy naphthalene (DHN) as a chemical sensor. The photooxidation efficiency of C70-B-T is higher than that of the individual components of C70-1 and B-T, and even higher than that of methylene blue (MB). The photooxidation rate constant of C70-B-T is 1.47 and 1.51 times as that of C70-1 and MB, respectively. The results indicate that the C70-antenna systems can be used as another structure motif for a heavy atom-free organic triplet photosensitizer.

Sign in / Sign up

Export Citation Format

Share Document