scholarly journals Ultrasonic Absorption Studies of the Nickel(II) Amino Acid Complexes in Aqueous Solutions

1978 ◽  
Vol 51 (9) ◽  
pp. 2596-2600 ◽  
Author(s):  
Shoji Harada ◽  
Kazumi Higashi ◽  
Kiyoshi Tamura ◽  
Michinori Hiraishi ◽  
Tatsuya Yasunaga
Keyword(s):  
Amino Acid ◽  
Aqueous Solutions ◽  
Ultrasonic Absorption ◽  
Amino Acid Complexes ◽  
Absorption Studies

scholarly journals Nonpolar Side Chains Affect the Photochemical Redox Reactions of Copper(II)–Amino Acid Complexes in Aqueous Solutions

ACS Omega ◽  
2021 ◽  
Author(s):  
Chen-Jui Lin ◽  
Po-Yen Wang ◽  
Yi-Liang Lin ◽  
Sheng-Te Chang ◽  
Chao-Sheng Hsu ◽  
...  
Keyword(s):  
Amino Acid ◽  
Aqueous Solutions ◽  
Redox Reactions ◽  
Side Chains ◽  
Amino Acid Complexes

Ultrasonic absorption studies in aqueous solutions of modified β-cyclodextrins

1990 ◽  
Vol 68 (12) ◽  
pp. 2131-2136 ◽  
Author(s):  
David J. Jobe ◽  
Ronald E. Verrall ◽  
Vincent C. Reinsborough
Keyword(s):  
Hydrogen Bond ◽  
Aqueous Solutions ◽  
Water Exchange ◽  
Relaxation Frequency ◽  
Ultrasonic Absorption ◽  
Frequency Range ◽  
Bond Rotation ◽  
Decyltrimethylammonium Bromide ◽  
Absorption Studies

Ultrasonic absorption studies over the frequency range 0.6–210 MHz were conducted in aqueous solutions of the following modified β-cyclodextrins (β-CD): 2,6-O-dimethyl-β-CD (DMβCD), 2,3,6-O-trimethyl-β-CD(TMβCD), and hydroxypropyl-β-CD (HPβCD). Anomalous ultrasonic absorption found in the three systems was attributed to three relaxations in the DMβCD and HPβCD systems and two in the TMβCD system. These relaxations were assigned to hydrogen bond "wig-wagging", to CD cavity water exchange, and to bond rotation within the CD units. The 1:1 DMβCD/decyltrimethylammonium bromide system was also investigated ultrasonically in solution. Keywords: ultrasonic absorption, modified β-cyclodextrins, surfactant inclusion, relaxation frequency.

Ultrasonic absorption studies of aqueous solutions of tert-butyl alcohol

1977 ◽  
Vol 81 (22) ◽  
pp. 2122-2126 ◽  
Author(s):  
Kiyoshi Tamura ◽  
Michio Maekawa ◽  
Tatsuya Yasunaga
Keyword(s):  
Aqueous Solutions ◽  
Butyl Alcohol ◽  
Ultrasonic Absorption ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Absorption Studies

Potentiometric study of enantioselective effects in α-amino acid complexes of copper(II)

1985 ◽  
Vol 104 (1) ◽  
pp. 63-67 ◽  
Author(s):  
I.L. Ulanovski ◽  
A.A. Kurganov ◽  
V.A. Davankov
Keyword(s):  
Amino Acid ◽  
Potentiometric Study ◽  
Amino Acid Complexes

scholarly journals Synthesis, Characterization, and Non-Covalent Interactions of Palladium(II)-Amino Acid Complexes

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4331
Author(s):  
David B. Hobart ◽  
Michael A. G. Berg ◽  
Hannah M. Rogers ◽  
Joseph S. Merola
Keyword(s):  
Amino Acid ◽  
High Resolution Mass Spectrometry ◽  
Resonance Spectroscopy ◽  
Spectroscopic Techniques ◽  
X Ray Diffraction ◽  
Amino Acid Complexes ◽  
Acetone Water ◽  
Square Planar ◽  
Non Covalent Interactions ◽  
Covalent Interactions

The reaction of palladium(II) acetate with acyclic amino acids in acetone/water yields square planar bis-chelated palladium amino acid complexes that exhibit interesting non-covalent interactions. In all cases, complexes were examined by multiple spectroscopic techniques, especially HRMS (high resolution mass spectrometry), IR (infrared spectroscopy), and 1H NMR (nuclear magnetic resonance) spectroscopy. In some cases, suitable crystals for single crystal X-ray diffraction were able to be grown and the molecular structure was obtained. The molecular geometries of the products are discussed. Except for the alanine complex, all complexes incorporate water molecules into the extended lattice and exhibit N-H···O and/or O···(HOH)···O hydrogen bonding interactions. The non-covalent interactions are discussed in terms of the extended lattice structures exhibited by the structures.

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