Geometric Influence on Intramolecular Photoinduced Electron Transfer in Platinum(II) Acetylide-Linked Donor-Acceptor Assemblies

被引：6

作者：

Molina-Ontoria, Agustin ^{[1
]}

Rivera-Nazario, Danisha M. ^{[1
]}

Tigreros, Alexis ^{[2
]}

Ortiz, Alejandro ^{[2
]}

Nunez, Jose E. ^{[1
]}

Insuasty, Braulio ^{[2
]}

Lueders, Daniela ^{[3
]}

Wolfrum, Silke ^{[3
]}

Guldi, Dirk M. ^{[3
]}

Echegoyen, Luis ^{[1
]}

机构：

[1] Univ Texas El Paso, Dept Chem, El Paso, TX USA

[2] Univ Valle, Dept Quim, Cali, Colombia

[3] Univ Erlangen Nurnberg, Dept Chem & Pharm, Interdisciplinary Ctr Mol Materials ICMM, D-91058 Erlangen, Germany

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2014年 / 20卷 / 35期

基金：

美国国家科学基金会;

关键词：

electron transfer; excited states; fullerenes; platinum(II) acetylide; triphenylamine; SENSITIZED SOLAR-CELLS; CHARGE SEPARATION; TRIPLET-STATE; BAND-GAP; COMPLEXES; POLYMERS; SYSTEMS; DESIGN; ENERGY; LUMINESCENCE;

D O I：

10.1002/chem.201402616

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new donor-acceptor system, in which the electron donor triphenylamine (TPA) and the electron acceptor C-60 are bridged through a cis- or trans-platinum(II) acetylide spacer have been prepared. Ground-state studies were conducted using electrochemistry and UV/Vis spectroscopy. Fluorescence studies suggested that charge transfer is the deactivation mechanism for the singlet excited state, and this was verified by transient absorption spectroscopy. Selective photoexcitation of 1 and 2 at 387 nm leads to a fast charge transfer between the TPA and C-60, which gives rise to a radical ion-pair state (TPA(center dot+)-Pt-C-60(center dot)). Our results suggest that charge transfer is favored for the cis configuration while the presence of the trans configuration in the Pt-II diacetylide results in a longer-lived charge separated states.

引用

页码：11111 / 11119

页数：9

共 52 条

[1]

[Anonymous], 2007, ANGEW CHEM-GER EDIT

[2] Formation of gels and liquid crystals induced by Pt•••Pt and π-π interactions in luminescent σ-alkynyl platinum(II) terpyridine complexes [J].