863432-10-4Relevant articles and documents
Polarization effect in luminescent mesogenic BF2 complexes derived from heterocyclic benzothiazoles
Hsu, Yuan?Chun,Wang, Chun?Yang,Hsiao, Pei?Chi,Cai, Yi-Hong,Lee, Gene?Hsiang,Lai, Chung K.
, (2019/12/09)
Two series of benzo(thia)xazoles 1–2 and one series of boron difluoride complexes 2-BF2 derived from benzothiazoles 2 were reported, and their mesomorphic and optical properties were investigated. The crystal and molecular structures of compound 2 and 2-BF2 (all n = 8) were determined by means of X?ray structural analysis, and both crystallize in the triclinic P-1 and monoclinic P21/c. The geometry at boron center is perfectly tetrahedral, and the overall molecular shapes are considered as rod?shape. Both benzo(thia)xazoles 1 and 2 exhibited N or/and SmC phase, and boron complexes 2-BF2 formed N or/and SmC phase. Benzothiazoles 2 showed a much wider temperature range of mesophase than those of benzoxazoles 1, which were attributed to the better polarization by sulfur atom incorporated. Boron complexes 2-BF2 (n = 10, 12) emitted a yellow?to?green emission at λmax = 569–571 nm in CH2Cl2. This is the first mesogenic BF2 complexes derived from benzothiazoles.
Mesogenic heterocycles derived from quinoxaline Schiff Bases
Kuo, Hsiu-Ming,Ko, Wan-Ping,Hsu, Yu-Te,Lee, Gene-Hsiang,Lai, Chung K.
, p. 6321 - 6333 (2016/09/23)
Three new series of heterocyclic quinoxaline Schiff Bases 1–2 were prepared, characterized and their mesomorphic properties were investigated. These compounds 1 and 2 are in fact geometric isomers in which an imine moiety (e.g., [sbnd]C[dbnd]N) is inversely incorporated into quinoxaline, leading to an opposite local dipole. Two single crystallographic structures 1 (m=8, n=8) and 2a (m=12, n=8) were determined by X-ray crystallographic analysis in order to understand the effect of mesomorphic properties. Weak H-bonds, CH–π and π–π interactions were found in both crystals, which were attributed to the formation of mesomorphic behavior. Variable temperature FT-IR experiments were performed to confirm the induced H-bonds. All series?of compounds 1–2 exhibited N/SmC or SmC phases, which were identified by optical microscope and confirmed by powder X-ray diffraction experiments. Compounds 2a have a slightly wider range of mesophase temperatures than that of compounds 1 and 2b.
Catenar bimetallomesogens derived from quinoxaline-salicylaldimine conjugates
Chu, Yian-Yuan,Kuo, Hsiu-Ming,Wu, Yu-Che,Wu, Chin-Yi,Sheu, Hwo-Shuenn,Lee, Gene-Hsiang,Chen, Ming-Chou,Lai, Chung K.
, p. 2389 - 2399 (2014/04/03)
The preparation, characterization, and mesomorphic properties of two series of tridentate N-salicylidene-2-hydroxyanilines and their metal complexes were described. The crystal and molecular structure of bis[2-hydroxy-4-propyloxy-N- (2-hydroxy-3,4-dipropy
Columnar/smectic metallomesogens derived from heterocyclic benzoxazoles
Wu, I-Tzu,Chaing, Pei-Yi,Chang, Wen-Jung,Sheu, Hwo-Shuenn,Lee, Gene-Hsiang,Lai, Chung K.
, p. 7358 - 7369 (2011/10/12)
The synthesis, mesomorphic behavior, and optical properties of two new series of metal complexes 1a,b-M (M=Pd, Cu, Zn) derived from benzoxazoles 2a,b are reported. The crystal and molecular structures of mesogenic 5-decyloxy-2-(6-decyloxybenzooxazol-2-yl)
Synthesis of quinoxaline-benzoxale conjugates and mesomorphic properties
Chen, Chun-Jung,Wu, Yu-Che,Sheu, Hwo-Shuenn,Lee, Gene-Hsiang,Lai, Chung K.
, p. 114 - 124 (2011/03/17)
A new series of non-discotic heterocyclic compounds 1a-e derived from quinoxaline was prepared and their mesomorphic properties investigated. The crystal and molecular structures of nonmesogenic 2,3-bis(3,4-didodecyloxyphenyl) quinoxaline-6-carboxylic aci
The effect of polar substituents on the heterocyclic benzoxazoles
Wang, Chung-Shu,Wang, I-Wen,Cheng, Kung-Lung,Lai, Chung K.
, p. 9383 - 9392 (2007/10/03)
The synthesis, characterization, and mesomorphic properties of a new type of heterocyclic compounds 1, 2 derived from benzoxazole are reported. In order to understand the relationship between the structure and the mesomorphic behavior, compounds containin
