yielded the discrete tetragonal organic barrel (OB4R). The presence of a molecular pocket ornamented with eight diamine moieties gives the potential for encapsulation of silver(I). The organic barrel was finally used as a molecular vessel for the controlled nucleation of silver nanoparticles (AgNPs) with fine size tuning through binding of AgI ions in the confined space of the barrel followed by reduction
Titanium‐catalyzed dehydroxylative dimerization of benzylic alcohols using isopropyl alcohol as a reductant has been realized by photoirradiation. The key step is photohomolysis of the Ti−O bond, which enables the utilization of isopropyl alcohol as a hydrogen‐atom donor. The reaction can also proceed under visible‐light irradiation in the presence of thioglycolic acid as a ligand.
[EN] COVALENT ORGANIC FRAMEWORK AND METHODS OF FABRICATION AND USES THEREOF<br/>[FR] ÉDIFICE ORGANIQUE COVALENT ET SES PROCÉDÉS DE PRÉPARATION ET UTILISATIONS ASSOCIÉES
申请人:NAT UNIV SINGAPORE
公开号:WO2020214095A1
公开(公告)日:2020-10-22
The present invention relates to, in general, methods of fabricating a covalent organic framework (COF) and the COF thereof. In particular, the method comprises forming an acylhydrazone bond with an optionally substituted 2-alkoxybenzohydrazidyl moiety. The resultant COF has an x-ray diffraction 2-theta peak at about 3˚ with a full width half maximum (FWHM) of about 0.2˚ to about 0.4˚.
This study reports the synthesis and photophysical properties of a star‐shaped, novel, fluoranthene–tetraphenylethene (TFPE) conjugated luminogen, which exhibits aggregation‐induced blue‐shifted emission (AIBSE). The bulky fluoranthene units at the periphery prevent intramolecular rotation (IMR) of phenyl rings and induces a blueshift with enhanced emission. The AIBSE phenomenon was investigated by solvatochromic
这项研究报告了一种星形,新颖的,荧蒽-四苯乙烯(TFPE)共轭的发光剂的合成和光物理性质,该发光剂具有聚集诱导的蓝移发射(AIBSE)。外围的庞大的荧蒽单元阻止了苯环的分子内旋转(IMR),并导致蓝移并增强了发射。通过溶剂变色和与温度有关的发射研究对AIBSE现象进行了研究。通过SEM和TEM研究了通过改变水/ THF比形成的TFPE纳米聚集体,并与光学性质相关。TFPE共轭物被发现是用于检测硝基芳族化合物(NAC)的有前途的荧光探针,尤其是对2,4,6-三硝基苯酚(PA)具有高灵敏度和高Stern-Volmer猝灭常数的检测。研究表明,在THF中30%和70%的水下形成的TFPE纳米聚集体显示出空前的灵敏度,检测限分别为0.8和0.5 ppb。水分数分别为30%和70%时形成的纳米聚集体表现出较高的Stern-Volmer常数(朝向PA的K sv分别为79998和51120 m -1)
White-Light Electroluminescence with Tetraphenylethylene as Emitting Layer of Aggregation-Induced Emissions Enhancement
作者:Jianfang Luo、Xiaohong Wang、Xiaomei Wang、Wenming Su
DOI:10.1002/cjoc.201200195
日期:2012.10
first‐step aggregation and the yellow emission attributed to the second‐step aggregation. Thus, it can be utilized to fabricate the white‐light OLEDs (WOLEDs) of the single‐emitting‐component. A three‐layer device with the brightness of 1200 cd·m−2 and current ef?ciency of 0.78 cd·A−1 emits the close to whitelight with the CIE coordinates of x=0.333 andy=0.358, when applied voltage from 8–13 V, verifying