Three-Dimensional Four-Connecting Organic Scaffolds with a Twist: Synthesis and Self-Assembly
摘要:
We have synthesized a novel class of four-connecting three-dimensional molecular scaffolds 2-5 based on biaryls for supramolecular self-assembly. The X-ray crystal structure analysis of 2 with ethanol reveals a novel O-H center dot center dot center dot O hydrogen-bonded helical self-assembly in three dimensions leading to the generation of channels in the crystal lattice, The tetraacid 3 also forms analogous channels in which the solvent molecules, viz., DMSO and H2O, reside. The structures of 2 and 3 amply illustrate the potential of three-dimensional four-connecting biaryls in developing functional mimics of inorganic zeolites.
Three-Dimensional Four-Connecting Organic Scaffolds with a Twist: Synthesis and Self-Assembly
摘要:
We have synthesized a novel class of four-connecting three-dimensional molecular scaffolds 2-5 based on biaryls for supramolecular self-assembly. The X-ray crystal structure analysis of 2 with ethanol reveals a novel O-H center dot center dot center dot O hydrogen-bonded helical self-assembly in three dimensions leading to the generation of channels in the crystal lattice, The tetraacid 3 also forms analogous channels in which the solvent molecules, viz., DMSO and H2O, reside. The structures of 2 and 3 amply illustrate the potential of three-dimensional four-connecting biaryls in developing functional mimics of inorganic zeolites.
various solutions. Due to the large surface area and the appropriate pore size, PCOF-Fe exhibited excellent biocatalytic catalytic performance, while PCOF-Co exhibited good electrocatalytic activity towards oxygen evolution reactions. These results indicate that 3D porphyrin-based COFs constructed from the tetrahedralbuildingblock with steric hindrance are promising candidates for single-site catalysis
两个三维(3D)卟啉的共价有机骨架,PCOF-1和PCOF-2 ,合成通过的亚胺缩合的平面卟啉四胺(TAPP或TABPP)和基于的3,3位阻的刚性四面体醛' ,5,5′-四(4-甲酰基苯基)二甲磺酰基(TFBM)。通过FT-IR和13 C CP-MAS固态NMR光谱研究了PCOF-1和PCOF-2的结构。粉末X射线衍射图显示出明显的结晶度,在PCOF-1的3.28°和3.75°处有两个强峰,在PCOF-2的2.63°和2.98°处有两个强峰。。结构仿真证实了它们的3D金红石型(pts)拓扑结构具有两种不同的孔径。X射线单晶衍射显示,构造块TFBM的扭曲四面体结构具有两个119°和107.8°的二面角,而模型化合物(MC)的平面正方形结构具有176.5°的扩展角。PCOF-1和PCOF-2的Brunauer-Emmett-Teller(BET)表面积分别为316和234 m 2 g -1。用
Nondoped Pure-Blue OLEDs Based on Amorphous Phenylenevinylene-Functionalized Twisted Bimesitylenes
作者:Jarugu Narasimha Moorthy、Parthasarathy Venkatakrishnan、Palani Natarajan、Zhenghuan Lin、Tahsin J. Chow
DOI:10.1021/jo1001565
日期:2010.4.16
The twisted bimesitylene scaffold hinders crystallization and imparts amorphous nature to the oligophenylenevinylenes (OPVs) generated by 2- and/or 4-fold functionalization. The resultant phenylenevinylenes 1-5 with unique molecular topology exhibit excellent thermal and solid-state luminescence properties. The amorphous nature permits their application as pure-blue emissive materials in OLEDs. Under nondoped conditions, the device performances observed surpass those for analogous and simple oligophenylenevinylenes known so far; for example, the device based on OPV 2 as an emitting material and structurally analogous Bim-DPAB as a hole-transporting material yields pure-blue electroluminescence with an external quantum efficiency of ca. 4.70% at 20 mA/cm(2), which is higher than those reported for nondoped pure-blue OPV emitters.
Three-Dimensional Four-Connecting Organic Scaffolds with a Twist: Synthesis and Self-Assembly
We have synthesized a novel class of four-connecting three-dimensional molecular scaffolds 2-5 based on biaryls for supramolecular self-assembly. The X-ray crystal structure analysis of 2 with ethanol reveals a novel O-H center dot center dot center dot O hydrogen-bonded helical self-assembly in three dimensions leading to the generation of channels in the crystal lattice, The tetraacid 3 also forms analogous channels in which the solvent molecules, viz., DMSO and H2O, reside. The structures of 2 and 3 amply illustrate the potential of three-dimensional four-connecting biaryls in developing functional mimics of inorganic zeolites.