Carbocyclic molecular clefts incorporating hydrogen bonding features

2002 ◽  
Vol 26 (6) ◽  
pp. 720-725 ◽  
Author(s):  
Jeremy D. Field ◽  
Peter Turner ◽  
Margaret M. Harding ◽  
Theano Hatzikominos ◽  
Linda Kim
Keyword(s):  
Hydrogen Bonding ◽  
Molecular Clefts

Biindolyl-based molecular clefts that bind anions by hydrogen-bonding interactions

2006 ◽  
Vol 47 (36) ◽  
pp. 6385-6388 ◽  
Author(s):  
Kyoung-Jin Chang ◽  
Min Kyung Chae ◽  
Changsoon Lee ◽  
Ji-Yeon Lee ◽  
Kyu-Sung Jeong
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonding Interactions ◽  
Molecular Clefts

scholarly journals Supramolecular architectures of conformationally controlled 1,3-phenyl-dioxalamic molecular clefts through hydrogen bonding and steric restraints

CrystEngComm ◽  
2011 ◽  
Vol 13 (14) ◽  
pp. 4748 ◽  
Author(s):  
Juan Saulo González-González ◽  
Francisco Javier Martínez-Martínez ◽  
Ana Lilia Peraza Campos ◽  
Maria de Jesus Rosales-Hoz ◽  
Efrén V. García-Báez ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Supramolecular Architectures ◽  
Molecular Clefts

scholarly journals Anion Binding Studies of Urea and Thiourea Functionalized Molecular Clefts

2021 ◽  
Vol 8 ◽  
Author(s):  
Utsab Manna ◽  
Bobby Portis ◽  
Tochukwu K. Egboluche ◽  
Muhammad Nafis ◽  
Md. Alamgir Hossain
Keyword(s):  
Hydrogen Bonding ◽  
Functional Groups ◽  
Color Change ◽  
Anion Binding ◽  
Dihydrogen Phosphate ◽  
Hydrogen Sulfate ◽  
Binding Studies ◽  
Hydrogen Bonding Interactions ◽  
Distinct Color ◽  
Molecular Clefts

Two rationally designed 4-nitrophenyl-based molecular clefts functionalized with thiourea (L1) and urea (L2) have been synthesized and studied for a variety of anions by UV-Vis and colorimetric techniques in DMSO. Results from the binding studies suggest that both L1 and L2 bind halides showing the order: fluoride > chloride > bromide > iodide; and oxoanions showing the order: dihydrogen phosphate > hydrogen sulfate > nitrate > perchlorate. Each receptor has been shown to form a 1:1 complex with an anion via hydrogen bonding interactions, displaying distinct color change for fluoride and dihydrogen phosphate in solution. As compared to the urea-based receptor L2, the thiourea-based receptor L1 exhibits stronger affinity for anions due the presence of more acidic thiourea functional groups.

Hydrogen bonding in liquid methanol at ambient conditions and at high pressure

2000 ◽  
Vol 98 (3) ◽  
pp. 125-134 ◽  
Author(s):  
T. Weitkamp, J. Neuefeind, H. E. Fisch
Keyword(s):  
High Pressure ◽  
Hydrogen Bonding ◽  
Ambient Conditions

Fluorescence and pi-hydrogen bonding in naphthols

1968 ◽  
Vol 65 ◽  
pp. 1587-1589 ◽  
Author(s):  
Bithika Ghosh ◽  
Sadhan Basu
Keyword(s):  
Hydrogen Bonding

Theoretical study of intramolecular hydrogen bonding and molecular geometry of 2-trifluoromethylphenol

10.1002/jcc.2 ◽  
1996 ◽  
Vol 17 (16) ◽  
pp. 1804-1819 ◽  
Author(s):  
Attila Kov�cs ◽  
Istv�n Kolossv�ry ◽  
G�bor I. Csonka ◽  
Istv�n Hargittai
Keyword(s):  
Hydrogen Bonding ◽  
Theoretical Study ◽  
Molecular Geometry ◽  
Intramolecular Hydrogen Bonding ◽  
Intramolecular Hydrogen

PEMANFAATAN GLISERIN DARI RESIDU GLISERIN SEBAGAI PLASTICIZER UNTUK PEMBUATAN BIOPLASTIK DENGAN BAHAN BAKU PATI BONGGOL PISANG KEPOK

2017 ◽  
Vol 5 (4) ◽  
pp. 26-32 ◽  
Author(s):  
Azaria Robiana ◽  
M. Yashin Nahar ◽  
Hamidah Harahap
Keyword(s):  
Tensile Strength ◽  
Hydrogen Bonding ◽  
Fatty Acid ◽  
Maximum Yield ◽  
Sem Analysis ◽  
Water Molecules ◽  
Banana Weevil ◽  
Gelatinization Temperature ◽  
Recharge Area ◽  
Maximum Quantity

Glycerin residue is waste oleochemical industry that still contain glycerin. To produce quality and maximum quantity of glycerin, then research the effect of pH acidification using phosphoric acid. Glycerin analysis includes the analysis of pH, Fatty Acid and Ester (FAE), and analysis of the levels of glycerin. The maximum yield obtained at pH acidification 2 is grading 91,60% glycerin and Fatty Acid and Ester (FAE) 3,63 meq/100 g. Glycerin obtained is used as a plasticizer in the manufacture of bioplastics. Manufacture of bioplastics using the method of pouring a solution with varying concentrations of starch banana weevil (5% w/v and 7% w/v), variations of the addition of glycerin (1 ml, 3 ml, 5 ml and 7 ml), and a variety of gelatinization temperature (60°C, 70°C, and 80°C). Analysis of bioplastics include FTIR testing, tensile strength that is supported by SEM analysis. The results obtained in the analysis of FTIR does not form a new cluster on bioplastics starch banana weevil, but only a shift in the recharge area only, it is due to the addition of O-H groups originating from water molecules that enter the polysaccharide through a mechanism gelatinitation that generates interaction hydrogen bonding strengthened. The maximum tensile strength of bioplastics produced at a concentration of starch 7% w/v, 1 ml glycerine and gelatinization temperature of 80°C is 3,430 MPa. While the tensile strength bioplastic decreased with increasing glycerin which can be shown from the results of SEM where there is a crack, indentations and lumps of starch insoluble.

Hydrogen bonding and conformations in echitamine salts

1963 ◽  
Vol 119 (3-4) ◽  
pp. 252-256 ◽  
Author(s):  
Brahama D. Sharma ◽  
Richard E. Marsh ◽  
Jerry Donohue
Keyword(s):  
Hydrogen Bonding
Sign in / Sign up

Export Citation Format

Share Document