Role of cooperative templates in the self-assembly process of microporous structures: syntheses and characterization of 12 new silver halide/thiocyanate supramolecular polymers

Abstract

12 new cation-templated complexes, {(BMPB)[AgI₃]} (BMPB = 1, 4-bis (methylpyridinium) benzene) (1), {(BPE)₂[Ag₂I₆]} (BPE = 1, 2-bis (pyridinium) ethane) (2), {(BPB)[Ag₂I₄]} (BPB = 1, 4-bis (pyridinium) butane) (3), {(BPH)[Ag₂I₄]} (BPH = 1, 7-bis (pyridinium) heptane) (4), {(DIBP)[Ag₂I₄]} (DIBP = 1, 1′-diisopropyl-4, 4′-bipyridinium) (5), {(BPB)[Ag₂Br₄]} (6), {(BPP)[Ag₂Br₄]} (=1, 5-bis (pyridinium) pentane) (7), {(DEBP)[Ag₂Br₄]} (DEBP = 1, 1′-diethyl-4, 4′-bipyridinium) (8), {(BDMLB)[Ag₂Br₄]} (BDMLB = 1, 4-bis (dimethylimidazolium) butane) (9), {(BPIB·Br)[Ag(NCS)₂]} (BPIB·Br = butane phenanthroline bromide) (10), {(DABP)[Ag₄I₆]} (DABP = 1, 1′-diamyl-4, 4′-bipyridinium) (11), {(BMLB)[Ag₂Br₂(NCS)₂]} (BMLB = 1, 4-bis (methylimidazolium) butane) (12), have been synthesized via the self-assembly reaction in solution. Owing to the cooperative template effects from organic cations and halide/thiocyanate anion compounds 1–11 contain a mononuclear anion structure [AgI₃]²⁻ (1), a dimeric anion [Ag₂I₆]⁴⁻ (2), linear chain [Ag₂X₄]²⁻ (3–10) and a cubane-like based one-dimensional anionic chain [Ag₄I₆]²⁻ (11) that are enclosed into the different cationic channels formed from the pyridinium, phenanthrolinium and imidazolium. While for 12, the compound possesses an infinite 2D supramolecular polypseudorotaxane penetrated by geminal dicationic groups.