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5篇 您的检索式:作者名="P.Hill"
    题名 作者 年代 出处 被引量
1Kappa‐opioid receptor agonists increase locomotor activity in the monoamine‐depleted rat model of parkinsonism显示文摘Neill R.Hughes Alexander T.McKnight Geoffrey N.Woodruff Michael P.Hill Alan R.Crossman Jonthan M.Brotchie 2004Mov Disord2004,,2:1
2Diporphyrin tweezer for multichannel spectroscopic analysis of enantiomeric excess显示文摘Chiral 1,1’-binaphthyl-linked diporphyrin‘tweezers’(R)-1/(S)-1 and the corresponding zinc(II)complexes(R)-2/(S)-2 were prepared as chiral host molecules,and their utility for chiral analyses(especially enantiomeric excess(ee)determinations)were evaluated.Tris(1-n-dodecyl)porphyrins were used for the first time as the interacting units.Host capabilities of the diporphyrin tweezers were investigated by titrations with(R,R)-and(S,S)-cyclohexane-1,2-diamine(CHDA).The host molecules could be used as multichannel probes of ee by using UVvis,circular dichroism(CD),fluorescence emission and 1H nuclear magnetic resonance(1 H-NMR)methods.Chiral configurations could also be differentiated using CD or 1HNMR spectroscopy.All three optical techniques give good resolution of ee with reasonable sensitivity considering the low concentrations used(ca.10^-6 mol·L^-1).The ee determination of CHDA enantiomers using NMR spectroscopy is also possible because of the reasonably well separated resonances in the case of(R,R)-and(S,S)-CHDA.Non-metallated(R)-1/(S)-1 hosts could not be used to detect chiral information in a strongly acidic chiral guest.This work demonstrates the utility of 1,1’-binapthyllinked chiral hosts for chiral analysis of ditopically interacting enantiomers.Daniel T.Payne Mandeep KChahal Vaclav Brezina Whitney A.Webre Katsuhiko Ariga Francis D’Souza Jan Labuta Jonathan P.Hill 2020Frontiers of Chemical Science and Engineering2020,14,1:1
3倒按揭须知的十件事显示文摘当前,倒按揭在美国方兴未艾。年龄在62岁以上的老年人所拥有的房产,在不售卖和不失去所有权的基础上,抵押给银行、保险公司等金融机构,可转化为一个稳固的现金收入。其实质是以房产作为抵押的所有人获得这笔贷款,在居住期间无需偿还,到期日为死亡、卖房或永久搬出住房时,以出售住房所得资金归还贷款本金、利息和各种费用。Christopher P.Hill 夏保强 2010大众理财顾问2010,,5:0
4Molecular rotor based on an oxidized resorcinarene显示文摘Molecular rotors are an important class of dynamic molecules which have been studied not only for their possible uses as components of molecular machines but also because of potential applications as probes of local viscosity in biological media,especially self-assembled membranes.For the former,factors affecting rotational motility are critical while for the latter the rotor activity must be complexed with an output signal(often fluorescence)for reporting of local conditions.Molecular single stator-double rotor activity of an oxidized resorcinarene(fuchsonarene)macrocycle containing unsaturated hemiquinonoid groups at its meso positions was investigated.Fuchsonarenes contain two hemiquinonoid substituents at diagonally-opposed meso-positions with two electron rich phenol groups at the remaining meso-positions between the hemiquinonoid groups.All meso-substituents are in proximity at one side of the resorcinarene macrocycle(so-called rccc-type isomer)with rotational activity of the phenol meso-substituents.Rotation rates of the phenol moieties can be controlled by varying temperature,solvent polarity and acidity of the medium of study with rotation being thermally activated in neutral and acidic media and tunable in the range from 2 s^(−1) to 20000 s^(−1).Experimental and computational data indicate that rotation of the mobile phenol meso-substituents is remotely affected by interactions with acidic solvents at the carbonyl CvO groups of macrocyclic acetyloxy groups,which occurs with the emergence of a lower energy electronic absorption band whose intensity is correlated with both the acidity of the medium and the rotation rate of the phenol substituents.Time-dependent DFT calculations suggest that the low energy band is due to a molecular conformational adjustment affecting electronic conjugation caused by strong interaction of macrocyclic acetyloxy carbonyl groups with the acid medium.The work presents a molecular mechanical model for estimating solution acidity and also gives insight into a possible method for modulating rotor activity in molecular machines.Daniel T.Payne Jan Labuta Zdeněk Futera Václav Březina Lenka Hanyková Mandeep K.Chahal Jonathan P.Hill 2022Organic Chemistry Frontiers2022,9,1:0
5DS2120低压差分器件在SCSI应用环境中的优势显示文摘选择SCSI(小型计算机系统接口)收发器时,无论是单端(SE)还是差分(HVD或LVD)器件,都要确定传输数据速率、电缆长度以及主控制器能够支持的最大器件数.Charles P.Hill 2003世界电子元器件2003,,2:0
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