Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2010-08-02

Journal: INORGANIC CHEMISTRY

Included Journals: PubMed、SCIE

Volume: 49

Issue: 15

Page Number: 6802-6804

ISSN: 0020-1669

Abstract: Room temperature (AT) phosphorescence is observed from a naphthalimide species for the first time in the square-planar chromophore Pt(dbbpy)(C  C-NI)(2), where NI = N-butyl-4-ethynylnaphthalimide and dbbpy = 4,4'-di-tert-butyl-2,2'-bipyridine. The combination of static and time-resolved absorption and photoluminescence data is uniformly consistent with triplet-state photophysics localized on an appended C  C-NI unit following excitation into the low-energy absorption bands. This molecule features rather impressive long-lifetime, high-quantum-efficiency NI-based RT phosphorescence (tau = 124 mu s; Phi = 0.215) centered at 621 nm, exemplifying how the platinum acetylide linkage strongly promotes intersystem crossing in the NI subunit, representative of a class of molecules whose excited states are typically dominated by singlet fluorescence.