An Excursion into the Intriguing World of Polymeric Tl(I) and Ag(I) Cyanoximates

The reaction of hot (~95 °C) aqueous solutions of Tl2CO3 with solid HL (HL = NC-C(=N-OH)-R is a cyanoxime, and R is an electron-withdrawing group; 37 ligands are known up-to-date) leads to crystalline yellow/orange TlL. Similarly, the reaction between AgNO3 and ML (M = K+, Na+; L = anion of the mono...

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Main Author: Nikolay Gerasimchuk
Format: Article
Language:English
Published: MDPI AG 2011-09-01
Series:Polymers
Subjects:
Online Access:http://www.mdpi.com/2073-4360/3/3/1475/
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spelling doaj-bccfbe0766f243db88eff935f171df1e2020-11-24T23:11:25ZengMDPI AGPolymers2073-43602011-09-01331475151110.3390/polym3031475An Excursion into the Intriguing World of Polymeric Tl(I) and Ag(I) CyanoximatesNikolay GerasimchukThe reaction of hot (~95 °C) aqueous solutions of Tl2CO3 with solid HL (HL = NC-C(=N-OH)-R is a cyanoxime, and R is an electron-withdrawing group; 37 ligands are known up-to-date) leads to crystalline yellow/orange TlL. Similarly, the reaction between AgNO3 and ML (M = K+, Na+; L = anion of the monodeprotonated cyanoxime) this time at room temperature in mixed ethanol/aqueous solutions leads to sparingly soluble, colored AgL in high-yield. All synthesized monovalent Tl and Ag complexes were characterized using a variety of spectroscopic methods and X-ray analysis, which revealed the formation of primarily 2D coordination polymers of different complexity. In all cases cyanoxime mono-anions act as bridging ligands. Thallium(I) cyanoximates adopt in most cases a double-stranded motif that is originated from centrosymmetric (TlL)2 dimers in which two Tl2O2 rhombs are fused into infinite “ladder-type” structure. There are very short (3.65–3.85 Å) intermetallic distances in (TlL)n, which are close to that (3.46 Å) in metallic thallium. This opens the possibility for the electrochemical or chemical generation of mixed valence Tl(I)/Tl(III) polymers that may exhibit electrical conductivity. Synthesized silver(I) compounds demonstrate a very significant (for multiple years!) stability towards visible light. There are three areas of potential practical applications of these unusual complexes: (1) battery-less detectors of UV-radiation, (2) non electrical sensors for gases of industrial importance, (3) antimicrobial additives to light-curable acrylate polymeric glues, fillers and adhesives used during introduction of indwelling medical devices. Chemical, structural, technological and biological aspects of application of Tl(I) and Ag(I) cyanoximes-based coordination polymers are reviewed.http://www.mdpi.com/2073-4360/3/3/1475/cyanoximescoordination polymers of Tl(I) and Ag(I)X-ray analysisUV-radiationsensors
collection DOAJ
language English
format Article
sources DOAJ
author Nikolay Gerasimchuk
spellingShingle Nikolay Gerasimchuk
An Excursion into the Intriguing World of Polymeric Tl(I) and Ag(I) Cyanoximates
Polymers
cyanoximes
coordination polymers of Tl(I) and Ag(I)
X-ray analysis
UV-radiation
sensors
author_facet Nikolay Gerasimchuk
author_sort Nikolay Gerasimchuk
title An Excursion into the Intriguing World of Polymeric Tl(I) and Ag(I) Cyanoximates
title_short An Excursion into the Intriguing World of Polymeric Tl(I) and Ag(I) Cyanoximates
title_full An Excursion into the Intriguing World of Polymeric Tl(I) and Ag(I) Cyanoximates
title_fullStr An Excursion into the Intriguing World of Polymeric Tl(I) and Ag(I) Cyanoximates
title_full_unstemmed An Excursion into the Intriguing World of Polymeric Tl(I) and Ag(I) Cyanoximates
title_sort excursion into the intriguing world of polymeric tl(i) and ag(i) cyanoximates
publisher MDPI AG
series Polymers
issn 2073-4360
publishDate 2011-09-01
description The reaction of hot (~95 °C) aqueous solutions of Tl2CO3 with solid HL (HL = NC-C(=N-OH)-R is a cyanoxime, and R is an electron-withdrawing group; 37 ligands are known up-to-date) leads to crystalline yellow/orange TlL. Similarly, the reaction between AgNO3 and ML (M = K+, Na+; L = anion of the monodeprotonated cyanoxime) this time at room temperature in mixed ethanol/aqueous solutions leads to sparingly soluble, colored AgL in high-yield. All synthesized monovalent Tl and Ag complexes were characterized using a variety of spectroscopic methods and X-ray analysis, which revealed the formation of primarily 2D coordination polymers of different complexity. In all cases cyanoxime mono-anions act as bridging ligands. Thallium(I) cyanoximates adopt in most cases a double-stranded motif that is originated from centrosymmetric (TlL)2 dimers in which two Tl2O2 rhombs are fused into infinite “ladder-type” structure. There are very short (3.65–3.85 Å) intermetallic distances in (TlL)n, which are close to that (3.46 Å) in metallic thallium. This opens the possibility for the electrochemical or chemical generation of mixed valence Tl(I)/Tl(III) polymers that may exhibit electrical conductivity. Synthesized silver(I) compounds demonstrate a very significant (for multiple years!) stability towards visible light. There are three areas of potential practical applications of these unusual complexes: (1) battery-less detectors of UV-radiation, (2) non electrical sensors for gases of industrial importance, (3) antimicrobial additives to light-curable acrylate polymeric glues, fillers and adhesives used during introduction of indwelling medical devices. Chemical, structural, technological and biological aspects of application of Tl(I) and Ag(I) cyanoximes-based coordination polymers are reviewed.
topic cyanoximes
coordination polymers of Tl(I) and Ag(I)
X-ray analysis
UV-radiation
sensors
url http://www.mdpi.com/2073-4360/3/3/1475/
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