Clathrate formation and molecular recognition by novel chalcogen-cyano interactions in tetracyanoquinodimethanes fused with thiadiazole and selenadiazole rings
摘要:
The intermolecular contacts between chalcogen atoms and cyano lone pairs were found to stabilize the crystalline state by electrostatic interaction. This interaction is one of the sources of the directionality in crystal packing of organic molecules and causes the formation of various types of inclusion lattices in the charge-transfer (CT) crystals of 1-3. By using highly selective formation of CT crystals with substituted aromatic hydrocarbons, particular isomers such as p-xylene or 2,6-dimethylnaphthalene (2,6-DMN) could be separated from the corresponding isomer mixtures. Lattice-related interaction plays a more significant role than molecular orbital interaction in the observed selectivity for para-disubstituted benzenes. However, the latter interaction is important for the recognition of 2,6-DMN from the 2,7 isomer.
materials chemistry.2 The redox reactions of quinones are characterized by the reversible interconversion with the corresponding hydroquinones. However, oxidation of hydroquinone is sometimes accompanied by further reaction of the resulting quinone to give the product with a condensed stucture.3 Here we report the formation and crystal structure of heterocyclic quinone 1, the first member of dibenzofurano[1
作者:A.S. Angeloni、V. Ceré、D. Dal Monte、E. Sandri、G. Scapini
DOI:10.1016/0040-4020(72)80137-6
日期:1972.1
derivatives of 5-oximinobenzo-2,1,3-oxadiazole-4-one is reported and their rearrangement to 4,7-dioximino derivatives of benzo-2,1,3-oxadiazole, 2-phenylbenzotriazole and benzotriazole described. Geometricisomerism related to oximino group was investigated. NMR spectra of 4,7-dioximes show the existence in solution of three geometricalisomers, whose configuration was assigned. The derivatives of 5-oximinobenzo-2
An approach to high open-circuit voltage polymer solar cells via alcohol/water-soluble cathode interlayers based on anthrathiadiazole derivatives
作者:Yang Miao、Tong Yang、Zong Cheng、Yuewei Zhang、Jingying Zhang、Yue Wang
DOI:10.1039/c7nj03061d
日期:——
polymer solarcells (PSCs). Dramatic improvement in device performance was observed when the CILs were inserted between the active layer and Al electrode. Especially, the device modified by quaternary ammonium ions terminated TBATD exhibits a power conversion efficiency (PCE) of 7.26%, which was 1.4 times of device with bare Al as cathode, due to the simultaneously enhanced open-circuitvoltage (Voc)
The title electron acceptors, TSDA (2) and BSDA (3), were prepared which crystallize isomorphously with the sulfur analogue, BTDA (1). The molecular interactions are enhanced in 2 and 3 compared with 1, which connect the molecules to form two-dimensionally expanded “sheet-like” networks and their infinite layers.