Premium
The Role of Substituent Effects in Tuning Metallophilic Interactions and Emission Energy of Bis‐4‐(2‐pyridyl)‐1,2,3‐triazolatoplatinum(II) Complexes
Author(s) -
Prabhath M. R. Ranga,
Romanova Julia,
Curry Richard J.,
Silva S. Ravi P.,
Jarowski Peter D.
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201502390
Subject(s) - homoleptic , substituent , excimer , excited state , photoluminescence , density functional theory , photochemistry , singlet state , metal , monomer , ligand (biochemistry) , chemistry , spectral line , materials science , fluorescence , atomic physics , computational chemistry , stereochemistry , optoelectronics , optics , polymer , organic chemistry , physics , biochemistry , receptor , astronomy
The photoluminescence spectra of a series of 5‐substituted pyridyl‐1,2,3‐triazolato Pt II homoleptic complexes show weak emission tunability (ranging from λ =397–408 nm) in dilute (10 −6 M ) ethanolic solutions at the monomer level and strong tunability in concentrated solutions (10 −4 M ) and thin films (ranging from λ =487–625 nm) from dimeric excited states (excimers). The results of density functional calculations (PBE0) attribute this “turn‐on” sensitivity and intensity in the excimer to strong Pt–Pt metallophilic interactions and a change in the excited‐state character from singlet metal‐to‐ligand charge transfer ( 1 MLCT) to singlet metal‐metal‐to‐ligand charge transfer ( 1 MMLCT) emissions in agreement with lifetime measurements.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom