A Tm(iii) complex displays an “off–on” 19F NMR/MRI response to Zn(ii) upon tuning the chemical exchange rate.

The synthesis of an emissive terthiophene-based imidazolium iodide as the corresponding N-heterocyclic carbene (NHC) preligand (4), and its Pd and Pt–NHC complexes (5a, 5b), along with their electropolymerized electrochromic polymers (P1–3) are reported.

A new terthiophene-based imidazole luminophore 5,5’-(1H-thieno[3,4-d]imidazole-4,6-diyl)bis(thiophene-2-carboxylic acid) (TIBTCH2, 5) was synthesized in one step from previously reported 4,6-di(thiophen-2-yl)-1H-thieno[3,4-d]imidazole (DTTI, 4), and their photophysical properties were studied and compared accordingly. Under solvothermal conditions, reacting 5 with Mn(OAc)2 yielded a new three-dimensional metal-organic framework (MOF, 6) which was structurally defined by single-crystal X-ray diffraction. In 6, all Mn(II) ions octahedrally bind to carboxylate-O atoms to form a linear Mn3 secondary building unit (SBU) that contains three distinct coordination modes. Importantly, 6 exhibits dual functional properties of ligand-based emission and metal-based magnetic behaviors.

New Rh and Ir complexes of an N-heterocyclic carbene (NHC) with featuring a terthiophene backbone were synthesized with enantiotropic polymorphic phases, along with their new electrochromic conducting metallopolymers were also synthesized.