Comprehensive Study on Mutual Interplay of Multiple V-Shaped Ligands on the Helical Nature of a Series of Coordination Polymers and Their Properties

Abstract

V-shaped ligands are commonly used for helical coordination polymer synthesis. However, employment of multiple V-shaped ligands does not always lead to a helical network. The mutual interplay of two V-shaped ligands, which is neither easily predictable nor well documented, plays a major role directing the self-assembly of the resultant network. We report here the construction of a series of novel coordination polymers {[Ni(OBA)(H2MDP)(H2O)]·(DMF)3}n (1),{[Ni(FBA)(H2MDP)]·(H2O)3·(DMF)}n (2),{[Ni2(IPA)2(H2MDP)2(H2O)]·(H2O)(DMF)}n (3),{[Ni(ADA)(H2MDP)]·(MeOH)}n (4),[Ni(TNBA)(H2MDP)2]n (5), {[Ni(PPA)(H2MDP)2]·(H2O)2}n (6), {[Ni(HDPA)2(H2MDP)2]}n (7), and [Ni(SBA)(H2MDP)]n (8) {where H2OBA = 4,4′-oxybis(benzoic acid), H2FBA = 4,4′-(hexafluoroisopropylidene)bis(benzoic acid), H2IPA = isophthalic acid, H2ADA =1,3-adamantanediacetic acid, H2TNBA = 5,5′-dithiobis(2-nitrobenzoic acid), H2PPA 1,4-phenylenedipropionic acid, H2DPA = diphenic acid H2SBA= 4,4′-sulfonyldibenzoic acid} using a combination of mixed V-shape...