Oligo(phenyleneethynylene)s 1 are rod-like compounds with undisturbed conjugation. In supplementation of the previously described members of this series 1a−e, with repeating units of up to n = 5, this work contains the preparation of higher oligomers 1f−i (n = 6, 7, 8, 10) through the use of the Sonogashira−Hagihara reaction. Both the absorption and the fluorescence bands showed convergence for increasing
Alkyloxy substituted organic dyes for high voltage dye-sensitized solar cell: Effect of alkyloxy chain length on open-circuit voltage
作者:Soo-Byung Ko、An-Na Cho、Mi-Jeong Kim、Chang-Ryul Lee、Nam-Gyu Park
DOI:10.1016/j.dyepig.2011.10.014
日期:2012.7
Three novel organic dyes (SB1, SB2, and SB3) containing 4-(hexyloxy)-N-(4-(hexyloxy)phenyl)-N-phenylaniline as electron donor and cyanoacrylic acid as electron acceptor bridged by alkyloxy (methyl = SB1, propyl = SB2 and hexyl = SB3) substituted p-phenylenevinylene linkers have been synthesized. Density functional theory (DFT) has employed to study electron distribution and intramolecular charge transfer. Increase in alkyl chain length in alkyloxy substituent leads to increase in open-circuit voltage (V-OC), which is found to be related to the increased electron lifetime at open-circuit condition. Under AM 1.5 G 1 sun light illumination (100 mW/cm(2)), an optimized SB3-sensitized cell show a short-circuit photocurrent density (J(SC)) of 12.83 mA/cm(2), an open-circuit voltage (V-OC) of 0.745 V and a fill factor (FF) of 0.64, corresponding to an overall conversion efficiency (eta) of 6.12%. Little degradation in eta observed over 40 days is indicative of long-term stability of the SB-series dyes. (C) 2011 Elsevier Ltd. All rights reserved.
Tuning the Moisture and Thermal Stability of Metal–Organic Frameworks through Incorporation of Pendant Hydrophobic Groups
作者:Trevor A. Makal、Xuan Wang、Hong-Cai Zhou
DOI:10.1021/cg4009224
日期:2013.11.6
An isostructural series of NbO-type porous metal-organic frameworks (MOFs) with different dialkoxy-substituents of formula Cu-2(TPTC-OR) (TPTC-OR = 2',5'-dialkyl}oxy-[1,1':4',1 ''-terphenyl]-3,3 '',5,5 ''-tetracarboxylate, R = Me, Et, Pr-n, (n)Hex) has been synthesized and characterized. The moisture stability of the materials has been evaluated, and a new superhydrophobic porous MOF has been identified. The relationship between pendant side chain length and thermal stability has been analyzed by in situ synchrotron powder X-ray diffraction, showing decreased thermal stability as the side chain length is increased, contradictory to thermogravimetric decomposition studies. Additionally, the four materials exhibit moderate Brunauer-Emmett Teller (BET) and Langmuir surface areas (1127-1396 m(2) g(-1) and 1414-1658 m(2) g(-1)) and H-2 capacity up to 1.9 wt % at 77 K and 1 bar.
Detert, Heiner; Sugiono, Erli, Advanced Synthesis and Catalysis, 1999, vol. 341, # 4, p. 358 - 362
作者:Detert, Heiner、Sugiono, Erli
DOI:——
日期:——
Soluble Ferrocene Conjugates for Incorporation into Self-Assembled Monolayers
作者:C. J. Yu、Yoochul Chong、Jon Faiz Kayyem、Michael Gozin
DOI:10.1021/jo982392m
日期:1999.3.1
A series of phenylethynyl oligomers (I-V) possessing a ferrocene and thiol at each termini have been synthesized. These oligomers have been designed to overcome the inherent insolubility of this class of complexes by substitution at the phenyl groups with methyl and propoxy substituents. Several new reactions for preparing arenethiol-protected compounds are described. Interestingly, the generation of an arenethiol anion during base- or fluoride-catalyzed deprotection has been characterized.