Tuning the Forster overlap integral: energy transfer over 20 Angstroms from a pyrene-based donor to borondipyrromethene (Bodipy)

被引：25

作者：

Bai, Dan ^{[1
]}

Benniston, Andrew C. ^{[1
]}

Hagon, Jerry ^{[1
]}

Lemmetyinen, Helge ^{[2
]}

Tkachenko, Nikolai V. ^{[2
]}

Harrington, Ross W. ^{[3
]}

机构：

[1] Newcastle Univ, Mol Photon Lab, Sch Chem, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

[2] Tampere Univ, Dept Chem & Bioengn, FIN-33101 Tampere, Finland

[3] Newcastle Univ, Crystallog Lab, Sch Chem, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 24期

基金：

英国工程与自然科学研究理事会;

关键词：

ELECTRON-TRANSFER; TRANSFER RATES; DEPENDENCE; FLUORESCENCE; CHROMOPHORES; ABSORPTION; SEPARATION; DYAD;

D O I：

10.1039/c3cp50173f

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：

A linear molecular dyad was synthesised comprising a pyrene-thiophene energy donor linked via a triazole unit to a borondipyrromethene (Bodipy) energy acceptor. The donor to acceptor separation distance is around 20 angstrom. Emission from the donor originates from a mixed pi-pi* and partial charge-transfer state and overlaps favourably with the absorption profile for the acceptor. The level of spectral overlap is dependent on the solvent polarity. Rates for electronic energy transfer were measured by transient absorption spectroscopy in solvents of varying polarity and refractive index. The measured rates for Forster energy transfer (k(EET)) correlate fairly well with the calculated overlap integrals (J(F)). A sigmoidal relationship is observed between k(EET) and the solvent polarity function Delta F.

引用

页码：9854 / 9861

页数：8

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