A copper(I) coordination polymer, [CuIL] (CP 1), shows luminescence mechanochromism with a color change from greenish-blue to yellow upon the application of pressure. Powder X-ray diffraction and Raman studies reveal that the changes in the bond lengths in crystalline CP 1 are the main cause of luminescence mechanochromism. The luminescence mechanochromic process of CP 1 preserves its crystallinity with a small lattice distortion, despite very high pressure, and it is a non-phase-transition process. After the addition of several drops of acetonitrile to the ground and compressed samples, the original greenish-blue emissive and crystalline states are restored. Therefore, the luminescence color conversion processes are fully reversible.

Six Cu(I) coordination polymers (CPs)-[CuIL] (1), {[CuIL]·2MeCN} (2), [CuIL] (3), {[CuIL]·CHCl} (4), {[CuIL]·CHCl} (5), and {[CuIL]·CH} (6)-were synthesized by self-assembly reactions of CuI and the flexible mixed N/S donor ligand 4-(2-(cyclohexylthio)ethoxy)pyridine (L). Single-crystal X-ray diffraction analyses reveal that these 1D CPs form sets of supramolecular isomers; 1 and 2 are based on CuI rhomboids, while 3-6 are based on cubane CuI clusters. Crystal-to-crystal transformations of CPs 1-6 were reversible under heat or in an appropriate solvent (acetonitrile, dichloromethane, chloroform, or benzene). In addition, crystal transformations between CPs 1 and 3 occurred through addition of L or CuI. Moreover, CPs 3-6 exhibited reversible guest exchange and crystal transformations on exposure to the vapor of volatile organic compounds and heat. Remarkably, a guest molecule was exchanged by other guest molecules in the vapor phase within very short times and without the use of acetonitrile as a solvent, which normally plays a key role in trapped solvent exchange experiments.

The title compound, which is used as an acaricide, insecticide and mematicide, crystallizes with two independent mol­ecules in the asymmetric unit. In the crystal, hydrogen bonds link adjacent mol­ecules, forming a three-dimensional network of mol­ecules stacked along the a-axis direction.

Three copper(I) complexes, [Cu8I8(PMS)4(MeCN)2] n (1), Cu4I4(PMS)4 (2), and Cu2I2(PMS)4 (3) were prepared by the self‐assembly reaction of mole ratio‐controlled CuI and pentamethylene sulfide (PMS). Single crystal X‐ray diffraction analyses displayed crystal structures of three complexes based on new S‐shaped Cu8I8, cubane Cu4I4, and rhomboid Cu2I2 cluster units for 1–3, respectively. Crystal transformations between 1, 2, and 3 were controlled by the addition of PMS or CuI/acetonitrile. Luminescence properties of 1 and 2 were investigated. Complex 1 showed two very weak emission bands, which were assigned to HE band for λmax = 415 nm and LE band for λmax = 575 nm under ultraviolet irradiation (λex = 355 nm). Complex 2 displayed luminescence thermochromism with a slightly hypsochromic shift from 572 to 565 nm (λex = 355 nm).

sulfinyl]-1H-pyrazole-3-carbonitrile}, is a member of the phenylpyrazole group of acaricides, and one of the phenylpyrazole group of insecticides. The dihedral angle between the planes of the pyrazole and benzene rings is 89.03 (9) . The fluorine atoms of the trifluoromethyl substituent on the benzene ring are disordered over two sets of sites, with occupancy ratios 0.620 (15)