A new Zn（Ⅱ） coordination polymer, {[Zn（1,3-bip）（oba）]·0.5H2O}n（1）,1,3-bip =1,3-bis（imidazole）propane, H2oba=4,4？-oxybis（benzoate））, have been synthesized and characterized by single-crystal X-ray d...A new Zn（Ⅱ） coordination polymer, {[Zn（1,3-bip）（oba）]·0.5H2O}n（1）,1,3-bip =1,3-bis（imidazole）propane, H2oba=4,4？-oxybis（benzoate））, have been synthesized and characterized by single-crystal X-ray diffraction, powder XRD, FTIR, TGA and elemental analysis techniques. The single-crystal X-ray diffraction reveals that complex 1 shows a 3D→3D twofold interpenetrating network that can be described as a 4-connected uninodal net with（65.8） topology. In addition, the photoluminescence property of complex 1 was also investigated at room temperature.展开更多
Stereocomplex crystallization in cyclic polymer blend and cyclic block copolymers was investigated by means of dynamic Monte Carlo simulations.Five polymer systems(linear polymer blend,linear diblock copolymer,cyclic ...Stereocomplex crystallization in cyclic polymer blend and cyclic block copolymers was investigated by means of dynamic Monte Carlo simulations.Five polymer systems(linear polymer blend,linear diblock copolymer,cyclic polymer blend,cyclic diblock copolymer and tetrablock copolymer)were established.It was interestingly found that the cyclic polymer blend exhibited the weakest stereocomplexation ability,while the two cyclic block copolymers showed stronger stereocomplexation ability than the linear diblock copolymer.This abnormal improved stereocomplexation ability of the cyclic block copolymers can be attributed to the synergy between the ring chain topology and the block copolymer structure.Compared with the linear block copolymers,the ring chain topology confined segmental motions of cyclic polymer chains to smaller regions,and then the segments belonging to the different blocks in the cyclic block copolymers have more chance to contact with each other.In this way,the cyclic block copolymers had better miscibility between segments belonging to different types of blocks,leading to the stronger stereocomplexation ability.展开更多
基金Supported by the National Youth Natural Science Foundation of China(No.21603133)
文摘A new Zn（Ⅱ） coordination polymer, {[Zn（1,3-bip）（oba）]·0.5H2O}n（1）,1,3-bip =1,3-bis（imidazole）propane, H2oba=4,4？-oxybis（benzoate））, have been synthesized and characterized by single-crystal X-ray diffraction, powder XRD, FTIR, TGA and elemental analysis techniques. The single-crystal X-ray diffraction reveals that complex 1 shows a 3D→3D twofold interpenetrating network that can be described as a 4-connected uninodal net with（65.8） topology. In addition, the photoluminescence property of complex 1 was also investigated at room temperature.
基金financially supported by the National Natural Science Foundation of China(Nos.52173020 and 21404050)the simulation work is also supported by the Open Research Fund of CNMGE Platform&NSCC-TJ(No.CNMGE202101013)Hao also thanks the supports from the Natural Science Foundation of Jiangsu Province(No.BK20190866)。
文摘Stereocomplex crystallization in cyclic polymer blend and cyclic block copolymers was investigated by means of dynamic Monte Carlo simulations.Five polymer systems(linear polymer blend,linear diblock copolymer,cyclic polymer blend,cyclic diblock copolymer and tetrablock copolymer)were established.It was interestingly found that the cyclic polymer blend exhibited the weakest stereocomplexation ability,while the two cyclic block copolymers showed stronger stereocomplexation ability than the linear diblock copolymer.This abnormal improved stereocomplexation ability of the cyclic block copolymers can be attributed to the synergy between the ring chain topology and the block copolymer structure.Compared with the linear block copolymers,the ring chain topology confined segmental motions of cyclic polymer chains to smaller regions,and then the segments belonging to the different blocks in the cyclic block copolymers have more chance to contact with each other.In this way,the cyclic block copolymers had better miscibility between segments belonging to different types of blocks,leading to the stronger stereocomplexation ability.
