利用溶剂引导相转变的方法制备了二噻吩并[3,2-b∶2',3'-d]噻吩-2-羧酸(DTTDA)自组织薄膜.利用原子力显微镜(Atomic Force Microscopy,AFM)、紫外可见(Ultra Violet-Visible,UV-Vis)吸收光谱、荧光光谱和导电原子力显微镜(Condu...利用溶剂引导相转变的方法制备了二噻吩并[3,2-b∶2',3'-d]噻吩-2-羧酸(DTTDA)自组织薄膜.利用原子力显微镜(Atomic Force Microscopy,AFM)、紫外可见(Ultra Violet-Visible,UV-Vis)吸收光谱、荧光光谱和导电原子力显微镜(Conductive Atomic Force Microscopy,C-AFM)对其成膜性能及光电子传输性能进行研究.研究结果表明:该化合物成膜性能较好,在成膜过程中分子间具有很强的相互作用,易形成紧密聚集的平整薄膜.由于该分子间易于产生较紧密的聚集,使得其具有较高的电子传输特性.因此,该化合物可望作为有机电致发光器件的候选材料.展开更多
The title compounds, 2-(3,3'-bithiophen-2,2'-yl)dibenzothiazole (BTDB) and 2-(dithieno[2,3-b:3',2'-d]thiophen-2,5-yl)dibenzothiazole (DTTDB), have been synthesized and characterized by FT-IR, NMR, MS, HRM...The title compounds, 2-(3,3'-bithiophen-2,2'-yl)dibenzothiazole (BTDB) and 2-(dithieno[2,3-b:3',2'-d]thiophen-2,5-yl)dibenzothiazole (DTTDB), have been synthesized and characterized by FT-IR, NMR, MS, HRMS and X-ray single-crystal diffraction. The crystal of BTDB crystallizes in triclinic, space group P1 with a = 9.2207(17), b = 10.453(2), c = 10.969(2) A, V= 981.2(3) A3 and Z = 2. Crystal data of DTTDB: orthorhombic system, space group Pbcn with a = 4.5290(8), b = 13.576(3), c = 32.033(6) A, V= 1969.6(6) A3 and Z = 4.展开更多
Third-order nonlinear optical (NLO) materials have broad application prospects in high-density data storage, optical computer, modern laser technology, and other high-tech industries. The structures and frequencies of...Third-order nonlinear optical (NLO) materials have broad application prospects in high-density data storage, optical computer, modern laser technology, and other high-tech industries. The structures and frequencies of Dinaphtho[2,3-b:2’,3’-d]thiophene-5,7,12,13-tetraone (DNTTRA) and its 36 derivatives containing azobenzene were calculated by using density functional theory B3LYP and M06-2X methods at 6-311++g(d, p) level, respectively. Besides, the atomic charges of natural bond orbitals (NBO) were analyzed. The frontier orbitals and electron absorption spectra of A-G5 molecule were calculated by TD-DFT (TD-B3LYP/6-311++g(d, p) and TD-M06-2X/6-311++g(d, p)). The NLO properties were calculated by effective finite field FF method and self-compiled program. The results show that 36 molecules of these six series are D-π-A-π-D structures. The third-order NLO coefficients γ (second-order hyperpolarizability) of the D series molecules are the largest among the six series, reaching 10<sup>7</sup> atomic units (10<sup><span style="color:#4F4F4F;font-family:-apple-system, " font-size:14px;white-space:normal;background-color:#ffffff;"="">-</span>33</sup> esu) of order of magnitude, showing good third-order NLO properties. Last, the third-order NLO properties of the azobenzene ring can be improved by introducing strong electron donor groups (e.g. -N(CH<sub>3</sub>)<sub>2</sub> or -NHCH<sub>3</sub>) in the azobenzene ring, so that the third-order NLO materials with good performance can be obtained.展开更多
The title compound 2-benzylamino-6-methyl-3-cyano-8-phenyl-5H-bispyrazolo[3,4-d,3',2'-b]pyrimidine crystallizes in orthorhombic, space group Pbca with a = 17.945(7), b =10.862(4), c = 19.481(7) A°, β = 9...The title compound 2-benzylamino-6-methyl-3-cyano-8-phenyl-5H-bispyrazolo[3,4-d,3',2'-b]pyrimidine crystallizes in orthorhombic, space group Pbca with a = 17.945(7), b =10.862(4), c = 19.481(7) A°, β = 90°, Z = 8, V = 1151.8(4) A°^3, Mr = 379.43, Dx = 1.327 g/cm^3,μ(MoKa) = 0.084 mm^-1, F(000) = 1584, the final R = 0.0513 and wR = 0.1128 for 2608 observed reflections (I 〉 2σ(I)). X-ray analysis reveals that the tricyclic portion of the molecule is effectively planar. In addition, there exist three intermolecular hydrogen bonds.展开更多
In this paper, the synthetic method for making 7,7’-dimethyl-2,5-bis(trimethylsilyl)-dithieno[2,3-b:3’,2’-d] silole (1) was developed by using 2,2’-dibromo-5,5’-bis-trimethyl-silanyl[3,3’]bithiophenyl as startin...In this paper, the synthetic method for making 7,7’-dimethyl-2,5-bis(trimethylsilyl)-dithieno[2,3-b:3’,2’-d] silole (1) was developed by using 2,2’-dibromo-5,5’-bis-trimethyl-silanyl[3,3’]bithiophenyl as starting material in one pot reaction. In the presence of NXS (X = Cl, Br, I), a novel ring-opening reation was occurred on the silole ring of 1 in DMF or THF. By using such kind of reaction, two types of ring opened products, (2’-halo-5,5’-bis(trimethylsilanyl)[3,3’]bithiophenyl-2-yl)-dimethylsilanols and 2,2’-dihalo-5,5’-bis(trimethylsi- lanyl)[3,3’]bithiophenyls were obtained efficiently.展开更多
文摘利用溶剂引导相转变的方法制备了二噻吩并[3,2-b∶2',3'-d]噻吩-2-羧酸(DTTDA)自组织薄膜.利用原子力显微镜(Atomic Force Microscopy,AFM)、紫外可见(Ultra Violet-Visible,UV-Vis)吸收光谱、荧光光谱和导电原子力显微镜(Conductive Atomic Force Microscopy,C-AFM)对其成膜性能及光电子传输性能进行研究.研究结果表明:该化合物成膜性能较好,在成膜过程中分子间具有很强的相互作用,易形成紧密聚集的平整薄膜.由于该分子间易于产生较紧密的聚集,使得其具有较高的电子传输特性.因此,该化合物可望作为有机电致发光器件的候选材料.
基金supported by the National Natural Science Foundation of China (20972041)Program for Innovation Scientists and Technicians Troop Construction Projects of Henan Province (104100510011)the Program of Henan University (SBGJ090506)
文摘The title compounds, 2-(3,3'-bithiophen-2,2'-yl)dibenzothiazole (BTDB) and 2-(dithieno[2,3-b:3',2'-d]thiophen-2,5-yl)dibenzothiazole (DTTDB), have been synthesized and characterized by FT-IR, NMR, MS, HRMS and X-ray single-crystal diffraction. The crystal of BTDB crystallizes in triclinic, space group P1 with a = 9.2207(17), b = 10.453(2), c = 10.969(2) A, V= 981.2(3) A3 and Z = 2. Crystal data of DTTDB: orthorhombic system, space group Pbcn with a = 4.5290(8), b = 13.576(3), c = 32.033(6) A, V= 1969.6(6) A3 and Z = 4.
文摘Third-order nonlinear optical (NLO) materials have broad application prospects in high-density data storage, optical computer, modern laser technology, and other high-tech industries. The structures and frequencies of Dinaphtho[2,3-b:2’,3’-d]thiophene-5,7,12,13-tetraone (DNTTRA) and its 36 derivatives containing azobenzene were calculated by using density functional theory B3LYP and M06-2X methods at 6-311++g(d, p) level, respectively. Besides, the atomic charges of natural bond orbitals (NBO) were analyzed. The frontier orbitals and electron absorption spectra of A-G5 molecule were calculated by TD-DFT (TD-B3LYP/6-311++g(d, p) and TD-M06-2X/6-311++g(d, p)). The NLO properties were calculated by effective finite field FF method and self-compiled program. The results show that 36 molecules of these six series are D-π-A-π-D structures. The third-order NLO coefficients γ (second-order hyperpolarizability) of the D series molecules are the largest among the six series, reaching 10<sup>7</sup> atomic units (10<sup><span style="color:#4F4F4F;font-family:-apple-system, " font-size:14px;white-space:normal;background-color:#ffffff;"="">-</span>33</sup> esu) of order of magnitude, showing good third-order NLO properties. Last, the third-order NLO properties of the azobenzene ring can be improved by introducing strong electron donor groups (e.g. -N(CH<sub>3</sub>)<sub>2</sub> or -NHCH<sub>3</sub>) in the azobenzene ring, so that the third-order NLO materials with good performance can be obtained.
文摘The title compound 2-benzylamino-6-methyl-3-cyano-8-phenyl-5H-bispyrazolo[3,4-d,3',2'-b]pyrimidine crystallizes in orthorhombic, space group Pbca with a = 17.945(7), b =10.862(4), c = 19.481(7) A°, β = 90°, Z = 8, V = 1151.8(4) A°^3, Mr = 379.43, Dx = 1.327 g/cm^3,μ(MoKa) = 0.084 mm^-1, F(000) = 1584, the final R = 0.0513 and wR = 0.1128 for 2608 observed reflections (I 〉 2σ(I)). X-ray analysis reveals that the tricyclic portion of the molecule is effectively planar. In addition, there exist three intermolecular hydrogen bonds.
文摘In this paper, the synthetic method for making 7,7’-dimethyl-2,5-bis(trimethylsilyl)-dithieno[2,3-b:3’,2’-d] silole (1) was developed by using 2,2’-dibromo-5,5’-bis-trimethyl-silanyl[3,3’]bithiophenyl as starting material in one pot reaction. In the presence of NXS (X = Cl, Br, I), a novel ring-opening reation was occurred on the silole ring of 1 in DMF or THF. By using such kind of reaction, two types of ring opened products, (2’-halo-5,5’-bis(trimethylsilanyl)[3,3’]bithiophenyl-2-yl)-dimethylsilanols and 2,2’-dihalo-5,5’-bis(trimethylsi- lanyl)[3,3’]bithiophenyls were obtained efficiently.