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Assembling and dissembling zinc-containing coordination polymers of 4′-phenyl-4,2′:6′,4″-terpyridine

Constable, Edwin C. and Zhang, Guoqi and Housecroft, Catherine E. and Neuburger, Markus and Zampese, Jennifer A.. (2010) Assembling and dissembling zinc-containing coordination polymers of 4′-phenyl-4,2′:6′,4″-terpyridine. CrystEngComm, 12 (7). pp. 2146-2152.

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Official URL: http://edoc.unibas.ch/dok/A5841491

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Abstract

The ligand 4′-phenyl-4,2′:6′,4″-terpyridine (3) reacts with Zn(OAc)2·2H2O to yield the one-dimensional coordination polymer [Zn2(3)(OAc)4]n or [Zn(3)(OAc)2]n depending upon the reaction conditions. Both compounds have been structurally characterized. The former contains {Zn2(µ-OAc)4} units, pairs of which are connected by a bridging ligand 3, while the latter contains tetrahedral zinc(II) centres, each bonded to two terminal [OAc]− ligands and two ligands 3. Both [Zn2(3)(OAc)4]n and [Zn(3)(OAc)2]n exhibit emissive behaviour in the solid state, the emissions being significantly enhanced with respect to non-coordinated ligand 3. Protonation of the coordination polymers produces a red shift in the emission maximum. However, treatment of [Zn2(3)(OAc)4]n with MeI or EtI quenches the emission. This is a consequence of the coordination polymer being dismantled, Zn–N bonds are cleaved and the complexes [Me2(3)][ZnI4] and [Et2(3)][ZnI4] are formed. The direct reaction of 3 with an excess of MeI produces [Me2(3)]I2 with N-methylation occurring at the two outer pyridine rings as observed in [Me2(3)][ZnI4].
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Housecroft)
UniBasel Contributors:Housecroft, Catherine Elizabeth and Constable, Edwin Charles and Zampese, Jennifer Ann and Zhang, Guoqi and Neuburger, Markus
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Royal Society of Chemistry
e-ISSN:1466-8033
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:08 May 2017 07:49
Deposited On:14 Sep 2012 06:59

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