ChemInform Abstract: LOW TEMPERATURE SPECTROSCOPY OF INTERNALLY HYDROGEN-BONDED 2-(2′-HYDROXY-5′-METHYLPHENYL)-BENZOTRIAZOLE IN A MIXED CRYSTAL

1984 ◽  
Vol 15 (12) ◽  
Author(s):  
D. F. BOCIAN ◽  
A. L. HUSTON ◽  
G. W. SCOTT
Keyword(s):  
Low Temperature ◽  
Mixed Crystal ◽  
Hydrogen Bonded

Low-temperature FTIR spectroscopy provides evidence for protein-bound water molecules in eubacterial light-driven ion pumps

2018 ◽  
Vol 20 (5) ◽  
pp. 3165-3171 ◽  
Author(s):  
Yurika Nomura ◽  
Shota Ito ◽  
Miwako Teranishi ◽  
Hikaru Ono ◽  
Keiichi Inoue ◽  
...  
Keyword(s):  
Low Temperature ◽  
Water Molecule ◽  
Ftir Spectroscopy ◽  
Proton Pump ◽  
Bound Water ◽  
Water Molecules ◽  
Ion Pumps ◽  
Functional Determinant ◽  
Ftir Study ◽  
Hydrogen Bonded

The present FTIR study showed that eubacterial light-driven H+, Na+ and Cl− pump rhodopsins contain strongly hydrogen-bonded water molecule, the functional determinant of light-driven proton pump. This explains well the asymmetric functional conversions of light-driven ion pumps.

The Preparation, Spectroscopic Characterization and X-Ray Structure of the Salt [Pt(η1 -C6H9)(Cy2PCH2CH2PCy2)(PPh3)]HCO3·3H2O Containing the Discrete, Uncoordinated, Hydrogen-Bonded Dimeric Bicarbonate Dianion [(HCO3)(H2O)3]22-

1999 ◽  
Vol 52 (10) ◽  
pp. 949 ◽  
Author(s):  
Martin A. Bennett ◽  
Glen B. Robertson ◽  
Pramesh N. Kapoor
Keyword(s):  
Low Temperature ◽  
Spectroscopic Characterization ◽  
Coordination Geometry ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
X Ray ◽  
Cell Dimensions ◽  
R Value ◽  
Unit Cell Dimensions ◽  
Hydrogen Bonded

Reaction of the cyclohexyne–platinum(0) complex [Pt(η2-C6H8)(Cy2PCH2CH2PCy2)]* with water and CO2 in the presence of triphenylphosphine gives the bicarbonate salt of the (η1-cyclohexenyl)platinum(II) cation, [Pt(η1-C6H9)(Cy2PCH2CH2 PCy2)(PPh3)] [HCO3] · 3H2O, which has been characterized by n.m.r. spectroscopy and single-crystal X-ray diffraction at low temperature. Crystals are triclinic, space group P1– with unit cell dimensions a 20.315(2), b 12.782(1), c 10.694(1) Å, α 66.61(1), β 104.73(1), γ 102.11(1)˚, and Z 2. The structure was refined to a final R value of 0.036 with use of 7553 reflections [I > 3σ(I)]. The cation has the expected, somewhat distorted planar coordination geometry; the anion consists of discrete, hydrogen-bonded dimers [(HCO3)(H2O)3]22-.

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