Singlet Fission Mediated Photophysics of BODIPY Dimers

被引：45

作者：

Montero, Raul ^{[1
]}

Martinez-Martinez, Virginia ^{[2
]}

Longarte, Asier ^{[3
]}

Epelde-Elezcano, Nerea ^{[2
]}

Palao, Eduardo ^{[4
]}

Lamas, Iker ^{[3
]}

Manzano, Hegoi ^{[5
]}

Agarrabeitia, Antonia R. ^{[4
]}

Lopez Arbeloa, Inigo ^{[2
]}

Ortiz, Maria J. ^{[4
]}

Garcia-Moreno, Inmaculada ^{[6
]}

机构：

[1] Univ Basque Country, UPV EHU, Laser SG1KER, Apartado 644, E-48080 Bilbao, Spain

[2] Univ Basque Country, UPV EHU, Fac Ciencias & Tecnol, Mol Spect Lab, Apartado 644, E-48080 Bilbao, Spain

[3] Univ Basque Country, UPV EHU, Fac Ciencias & Tecnol, Dept Quim Fis,Spect Lab, Apartado 644, E-48080 Bilbao, Spain

[4] Univ Complutense Madrid, Fac CC Quim, Dept Quim Organ 1, Ciudad Univ S-N, E-28040 Madrid, Spain

[5] Univ Basque Country, UPV EHU, Dept Fis Mat Condensada, Apartado 644, E-48080 Bilbao, Spain

[6] CSIC, Inst Quim Fis Rocasolano, Dept Sistemas Baja Dimensionalidad Superficies &, Serrano 119, E-28006 Madrid, Spain

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2018年 / 9卷 / 03期

关键词：

TRIPLET-TRIPLET ANNIHILATION; CHARGE-TRANSFER STATES; PHOTODYNAMIC THERAPY; EXCITON-FISSION; OXYGEN GENERATION; HIGHLY EFFICIENT; TETRACENE CRYSTALS; UP-CONVERSION; IN-VITRO; PHOTOSENSITIZERS;

D O I：

10.1021/acs.jpclett.7b03074

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 photodynamics of an orthogonal BODIPY dimer, particularly the formation of triplet states, has been explored by femtosecond and nanosecond transient absorption measurements. The short time scale data show the appearance of transient features of triplet character that, according to quantitative analysis of their intensities, account for more than 100% of the initially excited molecules, which reveals the occurrence of a singlet fission process in the isolated dimers. The formation rate of the triplet correlated state (1)(TT) is found to depend on the solvent polarity, pointing to the mediation of a charge transfer character state. The dissociation of the (1)(TT) state into pairs of individual triplets determines the triplet yield measured in the long time scales. The kinetic model derived from the results provides a comprehensive view of the photodynamics of BODIPY dimers and permits rationalization of the photophysical parameters of these systems.

引用

页码：641 / 646

页数：6

共 49 条

[1] Metal complexes as photo- and radiosensitizers [J].