本文证明,构成自组装单层 (SAM) 的分子的分子构象(除了组成和结构外)影响通过它们的电荷隧穿 (CT) 速率,在形式为 Au TS / S( CH 2 ) 2 CONR 1 R 2 //Ga 2 O 3 /EGaIn,其中R 1和R 2是不同长度的烷基链。链的长度 R 1和 R 2选择影响单层中分子的构象和构象均匀性。分子的构象影响单层的厚度(即隧道势垒宽度)及其在±1.0 V 时的整流比。当R 1 = H 时,分子有序且主要以反式扩展构象存在。然而,当R 1是烷基(例如,R 1 ≠H)时,它们的构象不再是全反式延伸的,并且分子采用更多的斜切二面角。构象类型的这种变化降低了构象顺序并影响隧穿速率。当 R 1 = R 2,当 R 1 = H 时,相对于通过具有相同总链长或厚度的 SAM 观察到的 CT 速率,CT 速率降低(高达 6.3 倍)。当 R 1 ≠ H ≠ R 2 时,存在较弱
本文证明,构成自组装单层 (SAM) 的分子的分子构象(除了组成和结构外)影响通过它们的电荷隧穿 (CT) 速率,在形式为 Au TS / S( CH 2 ) 2 CONR 1 R 2 //Ga 2 O 3 /EGaIn,其中R 1和R 2是不同长度的烷基链。链的长度 R 1和 R 2选择影响单层中分子的构象和构象均匀性。分子的构象影响单层的厚度(即隧道势垒宽度)及其在±1.0 V 时的整流比。当R 1 = H 时,分子有序且主要以反式扩展构象存在。然而,当R 1是烷基(例如,R 1 ≠H)时,它们的构象不再是全反式延伸的,并且分子采用更多的斜切二面角。构象类型的这种变化降低了构象顺序并影响隧穿速率。当 R 1 = R 2,当 R 1 = H 时,相对于通过具有相同总链长或厚度的 SAM 观察到的 CT 速率,CT 速率降低(高达 6.3 倍)。当 R 1 ≠ H ≠ R 2 时,存在较弱
First example of direct reductive amination of aldehydes with primary and secondary amines catalyzed by water-soluble transition metal catalysts
作者:André Robichaud、Abdelaziz Nait Ajjou
DOI:10.1016/j.tetlet.2006.03.153
日期:2006.5
selective direct reductive amination of aldehydes with primary and secondaryamines in water using gaseous hydrogen and water-soluble catalysts is developed. The catalytic system formed in situ from Pd(PhCN)2Cl2 and 2,2′-biquinoline-4,4′-dicarboxylic acid dipotassium salt (BQC), allows full conversion of aldehydes and the formation of desired alkylated amines with excellent yields and selectivities
Versatile Approach To Encoding Combinatorial Organic Syntheses Using Chemically Robust Secondary Amine Tags
作者:Zhi-Jie Ni、Derek Maclean、Christopher P. Holmes、Martin M. Murphy、Beatrice Ruhland、Jeffrey W. Jacobs、Eric M. Gordon、Mark A. Gallop
DOI:10.1021/jm960043j
日期:1996.1.1
Encoded combinatorial organic synthesis has recently emerged as a powerful tool for the discovery of biologically active compounds from complex chemical libraries. This report describes a new encoding methodology that useschemically robust secondary amines as tags. These amines are incorporated into an N-[(dialkylcarbamoyl)methyl]glycine-coding oligomer through simple chemistry that is compatible
Manganese-catalyzed deoxygenation of secondary and tertiary amides under mild conditions
作者:Jiamin Huang、Feixiang Sun、Weiping Liu
DOI:10.1016/j.jcat.2023.04.012
日期:2023.7
operationally simple transformation proceeds under mild conditions without external ligands and features high catalytic efficacy and good functional-group tolerance. Furthermore, the generality of this developed catalytic system was further demonstrated by the late-stagemodification of bioactive molecules.
Organopolysiloxane having amide group, and cosmetic material containing same
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP2280040A1
公开(公告)日:2011-02-02
Provided are an organopolysiloxane that exhibits good dispersion stability within not only organic oil agents but also cosmetic materials that contain a powder, and is able to produce a cosmetic material that exhibits excellent skin affinity, an organopolysiloxane that does not impart a sticky feeling, and exhibits excellent skin affinity and skin adhesion, and a cosmetic material including such an organopolysiloxane. The organopolysiloxane is represented by formula (1) below:
in which R1 represents a hydrocarbon group such as an alkyl group, R2 represents a group represented by formula (3) or formula (4) below:
in which either R4 represents a specific hydrocarbon group and R5 represents a hydrogen atom or a specific hydrocarbon group, or alternatively, at least one of R4 and R5 represents a hydroxyalkyl group, and
A represents a group containing an organosilyl group or organosiloxane residue.
ORGANOPOLYSILOXANE HAVING AMIDE GROUP, AND COSMETIC MATERIAL CONTAINING SAME
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP2921518A1
公开(公告)日:2015-09-23
Provided are an organopolysiloxane that exhibits good dispersion stability within not only organic oil agents but also cosmetic materials that contain a powder, and is able to produce a cosmetic material that exhibits excellent skin affinity, an organopolysiloxane that does not impart a sticky feeling, and exhibits excellent skin affinity and skin adhesion, and a cosmetic material including such an organopolysiloxane. The organopolysiloxane is represented by formula (1) below:
in which R1 represents a hydrocarbon group such as an alkyl group, R2 represents a group represented by formula (3) or formula (4) below:
in which either R4 represents a specific hydrocarbon group and R5 represents a hydrogen atom or a specific hydrocarbon group, or alternatively, at least one of R4 and R5 represents a hydroxyalkyl group, and
A represents a group containing an organosilyl group or organosiloxane residue.