Brightly Luminescent Pt(II) Pincer Complexes with a Sterically Demanding Carboranyl-Phenylpyridine Ligand: A New Material Class for Diverse Optoelectronic Applications / Prokhorov Anton M.,Hofbeck Thomas,Czerwieniec Rafal,Suleymanova Alfiya F.,Kozhevnikov Dmitry N.,Yersin Hartmut // JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - 2014. - V. 136, l. 27. - P. 9637-9642.

ISSN/EISSN:

0002-7863 / нет данных

Type:

Article

Abstract:

A series of three Pt(II) complexes with a doubly cyclometalating terdentate ligand L1, L1H(2) = 3,6-bis(p-anizolyl)-2-carboranyl-pyridine, and diethyl sulfide (1), triphenylphosphine (2), and t-butylisonitrile (3) as ancillary ligands were synthesized. X-ray diffraction studies of 1 and 2 show a coordination of the L1 ligand in a C-N-C mode in which the bulky and rigid o-carborane fragment is cyclometalated via a C atom. Importantly, no close intermolecular Pt-Pt contacts occur with this ligand type. The new Pt(II) pincer complexes display very high luminescence quantum yields at decay times of several tens of mu s even in solution under ambient conditions. On the basis of the low-temperature (T = 1.3 K) emission decay behavior, the emission is assigned to a ligand centered triplet excited state (LC)-L-3 with small (MLCT)-M-1,3 admixtures. Because the phosphorescence is effectively quenched by molecular oxygen, optical sensors operating in a wide range of oxygen pressure can be developed. Owing to the very high luminescence quantum yields, the new materials might also become attractive as emitter materials for diverse optoelectronic applications.

Author keywords:

CYCLOMETALATED PLATINUM(II) COMPLEXES; TRIPLET-STATE PROPERTIES; LIGHT-EMITTING DEVICES; RESOLUTION OPTICAL SPECTROSCOPY; 3-COORDINATE GOLD(I) COMPLEXES; EFFICIENCY ROLL-OFF; EXCITED-STATE; PHOSPHORESCENT PLATINUM(II); PHOTOPHYSICAL PROPERTIES; QUANTUM YIELDS

DOI:

10.1021/ja503220w

Web of Science ID:

ISI:000338980500021

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUL 9
Publisher	AMER CHEMICAL SOC
Address	1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Language	English
Keywords-Plus	CYCLOMETALATED PLATINUM(II) COMPLEXES; TRIPLET-STATE PROPERTIES; LIGHT-EMITTING DEVICES; RESOLUTION OPTICAL SPECTROSCOPY; 3-COORDINATE GOLD(I) COMPLEXES; EFFICIENCY ROLL-OFF; EXCITED-STATE; PHOSPHORESCENT PLATINUM(II); PHOTOPHYSICAL PROPERTIES; QUANTUM YIELDS
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Multidisciplinary
Author-Email	aprohor@yandex.ru rafal.czerwieniec@ur.de hartmut.yersin@ur.de
ResearcherID-Numbers	Prokhorov, Anton/B-9789-2011
ORCID-Numbers	Czerwieniec, Rafal/0000-0003-4789-6273 Suleymanova, Alfiya/0000-0003-3064-5427
Funding-Acknowledgement	German Federal Ministry of Education and Research (BMBF); Russian Foundation for Basic Research (RFBR)
Funding-Text	The authors gratefully acknowledge Dr. M. Bodensteiner and the Center for Chemical Analysis of the Faculty of Chemistry and Pharmacy at the University of Regensburg for X-ray diffraction measurements. We also thank the German Federal Ministry of Education and Research (BMBF) and Russian Foundation for Basic Research (RFBR) for financial support.
Number-of-Cited-References	99
Usage-Count-Last-180-days	6
Usage-Count-Since-2013	106
Journal-ISO	J. Am. Chem. Soc.
Doc-Delivery-Number	AL2UH