Universität zu Köln

Makarova, Anna A., Grachova, Elena V., Niedzialek, Dorota, Solomatina, Anastasia I., Sonntag, Simon, Fedorov, Alexander V., Vilkov, Oleg Yu., Neudachina, Vera S., Laubschat, Clemens, Tunik, Sergey P. and Vyalikh, Denis V. (2016). A curious interplay in the films of N-heterocyclic carbene Pt-II complexes upon deposition of alkali metals. Sci Rep, 6. LONDON: NATURE PUBLISHING GROUP. ISSN 2045-2322

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Abstract

The recently synthesized series of Pt-II complexes containing cyclometallating (phenylpyridine or benzoquinoline) and N-heterocyclic carbene ligands possess intriguing structures, topologies, and light emitting properties. Here, we report curious physicochemical interactions between in situ PVD-grown films of a typical representative of the aforementioned Pt-II complex compounds and Li, Na, K and Cs atoms. Based on a combination of detailed core-level photoelectron spectroscopy and quantum-chemical calculations at the density functional theory level, we found that the deposition of alkali atoms onto the molecular film leads to unusual redistribution of electron density: essential modification of nitrogen sites, reduction of the coordination Pt-II centre to Pt-0 and decrease of electron density on the bromine atoms. A possible explanation for this is formation of a supramolecular system Pt complex-alkali metal ion; the latter is supported by restoration of the system to the initial state upon subsequent oxygen treatment. The discovered properties highlight a considerable potential of the Pt-II complexes for a variety of biomedical, sensing, chemical, and electronic applications.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Makarova, Anna A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grachova, Elena V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Niedzialek, Dorota UNSPECIFIED UNSPECIFIED UNSPECIFIED Solomatina, Anastasia I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sonntag, Simon UNSPECIFIED UNSPECIFIED UNSPECIFIED Fedorov, Alexander V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vilkov, Oleg Yu. UNSPECIFIED UNSPECIFIED UNSPECIFIED Neudachina, Vera S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Laubschat, Clemens UNSPECIFIED UNSPECIFIED UNSPECIFIED Tunik, Sergey P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vyalikh, Denis V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-275842
DOI:	10.1038/srep25548
Journal or Publication Title:	Sci Rep
Volume:	6
Date:	2016
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2045-2322
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language COPPER-PHTHALOCYANINE CUPC; ENERGY-LEVEL SHIFT; ELECTRONIC-STRUCTURE; TRIS(8-HYDROXYQUINOLINE) ALUMINUM; INTERFACES; ABSORPTION; CHEMISTRY; TRANSPORT; DEVICES; STATES Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27584