scholarly journals Effects of Hydrogen Bonding on the Monolayer Properties of Amphiphilic Double-Decker-Shaped Polyhedral Silsesquioxanes

Langmuir ◽  
2011 ◽  
Vol 27 (14) ◽  
pp. 9068-9068 ◽  
Author(s):  
Asuman C. Kucuk ◽  
Jun Matsui ◽  
Tokuji Miyashita
Keyword(s):  
Hydrogen Bonding ◽  
Double Decker

Effects of Hydrogen Bonding on the Monolayer Properties of Amphiphilic Double-Decker-Shaped Polyhedral Silsesquioxanes

Langmuir ◽  
2011 ◽  
Vol 27 (10) ◽  
pp. 6381-6388 ◽  
Author(s):  
Asuman C. Kucuk ◽  
Jun Matsui ◽  
Tokuji Miyashita
Keyword(s):  
Hydrogen Bonding ◽  
Double Decker

Double-decker bis(tetradiazepinoporphyrazinato) rare earth complexes: crucial role of intramolecular hydrogen bonding

2016 ◽  
Vol 45 (30) ◽  
pp. 12041-12052 ◽  
Author(s):  
Ekaterina N. Tarakanova ◽  
Stanislav A. Trashin ◽  
Anton O. Simakov ◽  
Taniyuki Furuyama ◽  
Alexander V. Dzuban ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Rare Earth ◽  
Crucial Role ◽  
Intramolecular Hydrogen Bonding ◽  
Rare Earth Complexes ◽  
Specific Interactions ◽  
Double Decker ◽  
Intramolecular Hydrogen

Study focuses on specific interactions in diazepine-containing macroheterocycles.

scholarly journals New insights into the oxidation of phenoxatellurine with sulfuric acid

2019 ◽  
Vol 42 (1) ◽  
pp. 150-152 ◽  
Author(s):  
Farzin Mostaghimi ◽  
Jens Bolsinger ◽  
Enno Lork ◽  
Jens Beckmann
Keyword(s):  
Hydrogen Bonding ◽  
Sulfuric Acid ◽  
Coordination Polymer ◽  
Crystal Lattice ◽  
Ion Pairs ◽  
Radical Cations ◽  
Sulfate Ions ◽  
X Ray ◽  
X Ray Crystallography ◽  
Double Decker

Abstract The oxidation of phenoxatellurine (PT) with conc. H2SO4 was reinvestigated. Two crystalline products, namely [PT2][H3O](SO4H)3 (1) and [PT](SO4) (2) were isolated and fully characterized by X-ray crystallography. The structure of 1 features [PT2]2+ dications giving rise to double-decker structures with two parallel PT layers that arise from dimerisation of two radical cations [PT]˙+. The [PT2]2+ dications and the hydrogensulfate ions are associated via secondary Te···O interations. The oxonium ion and the hydrogensulfate ions are involved in hydrogen bonding. The structure of 2 comprises ion pairs consisting of [PT]2+ dications and sulfate ions, which form a 2D coordination polymer. In addition, adjacent sulfate ions in the crystal lattice bind to tellurium atoms via secondary secondary Te···O interations.

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.

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