Gas-phase basicity measurements of dipeptides that contain valine
作者:Greg S. Gorman、I. Jonathan Amster
DOI:10.1021/ja00066a044
日期:1993.6
Gas-phasebasicities of 22 dipeptides that contain valine were measured by a double bracketing method in a Fourier transform ion cyclotron resonance spectrometer. Matrix-assisted laser desorption was used to generate protonated peptide ions which were reacted with reference compounds to bracket the gas-phasebasicity. In addition, neutral peptide molecules were formed by substrate-assisted laser desorption
Unconventional ionic hydrogen bonds. 2. NH+.cntdot..cntdot..cntdot..pi.. Complexes of onium ions with olefins and benzene derivatives
作者:Michael Meot-Ner、Carol A. Deakyne
DOI:10.1021/ja00288a034
日期:1985.1
des energies de dissociation des agregats formes par NH 4 + ou MeNH 3 + avec C 2 H 4 et des derives du benzene. Comparaison aux calculs de initio pour NH 4 + avec C 2 H 4 , C 6 H 6 et C 6 H 5 F: interaction electrostatique predominante
测定实验性能量去离解和聚集体形成 par NH 4 + ou MeNH 3 + avec C 2 H 4 et des 衍生出二苯。Comparaison aux calculs de initio pour NH 4 + avec C 2 H 4 , C 6 H 6 et C 6 H 5 F:相互作用静电占优势
Carba-<i>closo</i>-dodecaborate Anions with Two Functional Groups: [1-R-12-HC≡C-<i>closo</i>-1-CB<sub>11</sub>H<sub>10</sub>]<sup>−</sup> (R = CN, NC, CO<sub>2</sub>H, C(O)NH<sub>2</sub>, NHC(O)H)
作者:Michael Hailmann、Szymon Z. Konieczka、Alexander Himmelspach、Jochen Löblein、Guido J. Reiss、Maik Finze
DOI:10.1021/ic501526g
日期:2014.9.2
Disubstituted carba-closo-dodecaborateanions with one functional group bonded to the cluster carbon atom and one ethynyl group bonded to the antipodal boron atom were synthesized from easily accessible closo-1-CB11} clusters. [Et4N][1-NC-12-HC≡C-closo-1-CB11H10] ([Et4N]4b) was prepared starting from Cs[12-Et3SiC≡C-closo-1-CB11H11] (Cs1c) via salts of the anions [1-HO(O)C-12-HC≡C-closo-1-CB11H10]− (2b) and
[(CH<sub>3</sub>
)<sub>3</sub>
NH]<sub>3</sub>
Bi<sub>2</sub>
I<sub>9</sub>
: A Polar Lead-Free Hybrid Perovskite-Like Material as a Potential Semiconducting Absorber
作者:Jing Zhang、Shiguo Han、Chengmin Ji、Weichuan Zhang、Yuyin Wang、Kewen Tao、Zhihua Sun、Junhua Luo
DOI:10.1002/chem.201703346
日期:2017.12.6
Perovskitehybrids of lead organometal halides, most notably CH3NH3PbI3, have shown extremely promising applications in the field of optoelectronics, because of their remarkable semiconducting and light‐absorbing properties. However, two key issues—the toxicity of lead and the poor ambient instabilities—have restrained their further commercialization. Herein, we have designed a new stable polar lead‐free
铅有机金属卤化物的钙钛矿杂化物,最著名的是CH 3 NH 3 PbI 3,因为它们具有显着的半导体和光吸收特性,因此在光电子领域显示出极有希望的应用。但是,两个关键问题-铅的毒性和恶劣的环境不稳定性-限制了它们的进一步商业化。本文中,我们通过阳离子取代策略[[CH 3)3 N] 3 Bi 2 I 9(1)设计了一种新型的稳定极性无铅杂化材料,该材料表面采用了0D无机钙钛矿样结构分享BiI 6八面体。有趣的是,1具有出色的吸收性能,窄的光学带隙约为2.0 eV,正温度依赖性的电导率证实了其半导体特性。另外,1具有在环境条件下对分解的良好的相稳定性,远优于CH 3 NH 3 PbI 3。这项工作表明1作为光电应用具有高相稳定性的无铅半导体吸收剂的潜力。
Experimental and theoretical study of the kinetic of proton transfer reaction by ion mobility spectrometry
dimer formation, the reactions were carried out at elevated temperatures (170–230 °C). We measured rate constants of 1.17 × 10−9, 0.90 × 10−9 and 0.68 × 10−9 cm3 s−1 for protontransfer from H3O+, Ac·H+ and TMA·H+ to DMP, respectively. The experimental rate constants were almost temperature independent, indicating that no activation energy was involved in those protontransferreactions. The rate constants