A Bridgman growth furnace was modified by adding adiabatic material between two furnace tubes. The appropriate temperature gradient of 10～30 ℃/cm at the growth interface was obtained by adjusting the distance between the two sections and controlling their temperature. The infrared nonlinear optical (NLO) crystal LiInS2 was successfully grown by the accelerated crucible rotation technique (ACRT). The crystal was characterized by using XRD and transmission microscopy. It is found that the UV-VIS-NIR and Mid-IR transmittances are about 40%.
A novel imidazole derivative with functional group and π-conjugated system, 1- [trans-4-(4-diethylaminostyryl)phenyl]imidazole (abbreviated as L), and its CoII complex (CoCl2L4)2 (Co2C168H184N24Cl4, Mr = 2799.05 ) have been synthesized and the crystal structure of the latter was determined by X-ray diffraction. The crystal is of triclinic, space group P1 with a = 8.823(3), b = 18.799(7), c = 23.065(9) ’, α = 77.349(6), β = 83.128(7), γ = 80.942(3)°, V = 3671.5(12) ’3, Z = 1, Dc = 1.266 g/cm3, μ = 0.361 mm-1, F(000) = 1482, the final R = 0.0587 and wR = 0.1284 for 6562 observed reflections with I > 2σ(I). In the molecular structure of (CoCl2L4)2, there are two crystallographically unique units. The CoII atoms are six-coordinated by four N atoms from four imidazole ligands (L) and two Cl atoms to form a distorted octahedral geometry. The optical properties of complex (CoCl2L4)2 have been experimentally studied.
JIN FengHAO Fu-YingMA Ji-LongWU Jie-YingTIAN Yu-Peng
A novel bis(β-diketonate) derivate, 3,6-bis(4,4,4-trifluorobutane-1,3-dione)-9-n- butylcarbazole 1, was synthesized and structurally characterized by single-crystal X-ray diffrac- tion. The crystal belongs to the monoclinic system, space group P21/c with a = 10.961(6), b = 22.942(13), c = 9.408(6) , α = 90, β = 109.663(9), γ = 90o, V = 2228(2) 3, Z = 4, Dc = 1.489 g/cm3, C24H19F6NO4, Mr = 499.40, F(000) = 1024 and μ = 0.134 mm–1. The structure was refined to the final R = 0.0699 and wR = 0.1627 for 3744 independent reflections (Rint = 0.1288) and 1349 observed reflections (I > 2σ(I)). Compound 1 consists of carbazole unit and two terminal diketonate groups, in which carbazole and its two adjacent diketonate rings are almost coplanar. Moreover, compound 1 was characterized with IR, elemental analysis, 1H NMR, MS, electronic absorption, and single-photon fluorescence.
YANG LinaZHAO Xiang-HuaZHOU Hong-PingWU Jie-YingYANG Jia-XiangSHAO Guo-QuanCHENG Le-HuaTIAN Yu-Peng
A new acid-base fluorescent switch containing both imidazo[4,5-f][1,10]-phenanthroline and triphenylamine groups has been synthesized.Its fluorescence emissions and absorptions can be reversibiy changed through protonation/deprotonation of imidazole and amine moiety by controlling the intramolecular charge transfer(ICT) process,leading to off-on-off fluorescent molecular switching.
Hai Guang ZhangXu Tang TaoKao Shan ChenChun Xue YuanShi Na YanMin Hua Jiang
