scholarly journals Tuning the Wettability and Surface Free Energy of Poly(vinylphenol) Thin Films by Modulating Hydrogen-Bonding Interactions

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 523 ◽  
Author(s):  
Chih-Feng Wang ◽  
Dula Daksa Ejeta ◽  
Jian-Yi Wu ◽  
Shiao-Wei Kuo ◽  
Ching-Hsuan Lin ◽  
...  
Keyword(s):  
Thin Films ◽  
Free Energy ◽  
Hydrogen Bonding ◽  
Thermal Treatment ◽  
Hydrogen Bonds ◽  
Surface Free Energy ◽  
Intermolecular Hydrogen Bonding ◽  
Intermolecular Hydrogen Bonds ◽  
Hydrogen Bonding Interactions ◽  
Effective Manner

The ability to tune the surface properties of a polymer film in a simple and effective manner is important for diverse biological, industrial, and environmental applications. In this work, we investigated whether or not the surface free energy of poly(vinyl phenol; PVPh) can be tuned by adjusting the casting solvent and the thermal treatment time, which alters the proportions of intra-and intermolecular hydrogen bonding interactions. Compared to the untreated sample, in tetrahydrofuran (THF) system, the thermal treatment resulted in a lower proportion of intermolecular hydrogen bonds and a concomitant decrease in the surface free energy (from 39.3 to 18.8 mJ/m2). In contrast, the thermal treatment in propylene glycol methyl ether acetate (PGMEA) and ethyl-3-ethoxypropionate (EEP) systems increased the proportion of intermolecular hydrogen bonds and the surface free energy of the polymer thin films, from 45.0 to 54.3 mJ/m2 for PGMEA and from 45.5 to 52.9 mJ/m2 for EEP. Controlling intermolecular hydrogen-bonding interactions is a unique and easy method for tuning the surface free energies of polymer substances.

scholarly journals Crystal structures of [Cu(phen)(H2O)3(MF6)]·H2O (M = Ti, Zr, Hf) and [Cu(phen)(H2O)2F]2[HfF6]·H2O

2021 ◽  
Vol 77 (2) ◽  
pp. 165-170
Author(s):  
Matthew L. Nisbet ◽  
Kenneth R. Poeppelmeier
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Crystal Structures ◽  
Intermolecular Hydrogen Bonding ◽  
Intermolecular Hydrogen Bonds ◽  
Early Transition Metal ◽  
Hydrogen Bonding Interactions ◽  
Bimetallic Compounds ◽  
Molecular Compounds ◽  
Molecular Salt

The crystal structures of three bridged bimetallic molecular compounds, namely, triaqua-2κ3 O-μ-fluorido-pentafluorido-1κ5 F-(1,10-phenanthroline-2κ2 N,N′)copper(II)titanium(IV) monohydrate, [Cu(TiF6)(phen)(H2O)3]·H2O (phen is 1,10-phenanthroline, C12H8N2), (I), triaqua-2κ3 O-μ-fluorido-pentafluorido-1κ5 F-(1,10-phenanthroline-2κ2 N,N′)copper(II)zirconium(IV) monohydrate, [Cu(ZrF6)(phen)(H2O)3]·H2O, (II), and triaqua-2κ3 O-μ-fluorido-pentafluorido-1κ5 F-(1,10-phenanthroline-2κ2 N,N′)copper(II)hafnium(IV) monohydrate, [Cu(HfF6)(phen)(H2O)3]·H2O, (III), and one molecular salt, bis[diaquafluorido(1,10-phenanthroline-κ2 N,N′)copper(II)] hexafluoridohafnate(IV) dihydrate, [CuF(phen)(H2O)2]2[HfF6]·2H2O, (IV), are reported. The bridged bimetallic compounds adopt Λ-shaped configurations, with the octahedrally coordinated copper(II) center linked to the fluorinated early transition metal via a fluoride linkage. The extended structures of these Λ-shaped compounds are organized through both intra- and intermolecular hydrogen bonds and intermolecular π–π stacking. The salt compound [Cu(phen)(H2O)2F]2[HfF6]·H2O displays an isolated square-pyramidal Cu(phen)(H2O)2F+ complex linked to other cationic complexes and isolated HfF6 2− anions through intermolecular hydrogen-bonding interactions.

Unravelling hydrogen bonding interactions of tryptamine–water dimer from neutral to cation

2017 ◽  
Vol 19 (37) ◽  
pp. 25260-25269 ◽  
Author(s):  
Zongyuan Liu ◽  
Carl O. Trindle ◽  
Quanli Gu ◽  
Wei Wu ◽  
Peifeng Su
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Water Dimer ◽  
Physical Origin ◽  
Intermolecular Hydrogen Bonds ◽  
Hydrogen Bonding Interactions

The physical origin for the three intermolecular hydrogen bonds in the neutral and cationic forms of the tryptamine–water dimer is explored.

scholarly journals Crystal structure ofcatena-poly[[[triaquastrontium]-di-μ2-glycinato] dibromide]

2015 ◽  
Vol 71 (7) ◽  
pp. 875-878 ◽  
Author(s):  
Palanisamy Revathi ◽  
Thangavelu Balakrishnan ◽  
Kandasamy Ramamurthi ◽  
Subbiah Thamotharan
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Alkaline Earth ◽  
Three Dimensional ◽  
Water Molecules ◽  
Intermolecular Hydrogen Bonds ◽  
Rotation Axes ◽  
Hydrogen Bonding Interactions ◽  
Carboxylate Groups ◽  
Glycine Molecule

In the title coordination polymer, {[Sr(C2H5NO2)2(H2O)3]Br2}n, the Sr2+ion and one of the water molecules are located on twofold rotation axes. The alkaline earth ion is nine-coordinated by three water O atoms and six O atoms of the carboxylate groups of four glycine ligands, two in a chelating mode and two in a monodentate mode. The glycine molecule exists in a zwitterionic form and bridges the cations into chains parallel to [001]. The Br−counter-anions are located between the chains. Intermolecular hydrogen bonds are formed between the amino and carboxylate groups of neighbouring glycine ligands, generating a head-to-tail sequence. Adjacent head-to-tail sequences are further interconnected by intermolecular N—H...Br hydrogen-bonding interactions into sheets parallel to (100). O—H...Br and O—H...O hydrogen bonds involving the coordinating water molecules are also present, consolidating the three-dimensional hydrogen-bonding network.

Malabaricone A isolated from a methanol extract of Myristica malabarica

2006 ◽  
Vol 62 (4) ◽  
pp. o1338-o1339 ◽  
Author(s):  
A. K. Bauri ◽  
Sabine Foro ◽  
Hans J. Lindner ◽  
S. K. Nayak
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Methanol Extract ◽  
Alkyl Chain ◽  
Zigzag Chain ◽  
Intermolecular Hydrogen Bonds ◽  
Hydrogen Bonding Interactions ◽  
Benzene Rings

The title compound, malabaricone A [systematic name: 1-(2,6-dihydroxyphenyl)-9-phenylnonan-1-one], C21H26O3, contains two benzene rings linked through a C9 alkyl chain. Both intra- and intermolecular O—H...O hydrogen-bonding interactions stabilize the packing. The intermolecular hydrogen bonds result in the formation of an infinite zigzag chain.

scholarly journals 1,4a,7-Trimethyl-7-vinyl-1,2,3,4,4a,4b,5,6,7,8,10,10a-dodecahydrophenanthrene-1-carboxylic acid

2009 ◽  
Vol 65 (6) ◽  
pp. o1429-o1429
Author(s):  
Zhen-Dong Zhao ◽  
Yu-Xiang Chen ◽  
Yu-Min Wang ◽  
Liang-Wu Bi
Keyword(s):  
Hydrogen Bonding ◽  
Carboxylic Acid ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Molecular Conformation ◽  
Slash Pine ◽  
Carboxyl Groups ◽  
Isopimaric Acid ◽  
Hydrogen Bonding Interactions ◽  
Cyclohexene Ring

The title compound, also known as isopimaric acid, C20H30O2, was isolated from slash pine rosin. There are two unique molecules in the unit cell. The two cyclohexane rings have classical chair conformations. The cyclohexene ring represents a semi-chair. The molecular conformation is stabilized by weak intramolecular C—H...O hydrogen-bonding interactions. The molecules are dimerized through their carboxyl groups by O—H...O hydrogen bonds, formingR22(8) rings.

Synthese, Struktur und thermisches Verhalten von Thiophosphorsäuretriamid SP(NH2)3 [1] / Synthesis, Structure, and Thermal Behaviour of Phosphorothionic Triamide SP(ΝΗ2)3 [1]

1989 ◽  
Vol 44 (8) ◽  
pp. 942-945 ◽  
Author(s):  
Wolfgang Schnick
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Thermal Properties ◽  
Single Crystal ◽  
Melting Temperature ◽  
Intermolecular Hydrogen Bonding ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Ray Methods ◽  
Single Bonds

Phosphorothionic triamide SP(NH2)3 is obtained by slow addition of SPCl3 dissolved in dry CH2Cl2 to a satured solution of NH3 in CH2Cl2 at —50°C. Ammonium chloride is removed from the resulting precipitate by treatment with HNEt2 followed by extraction with CH2Cl2. Coarse crystalline SP(NH2)3 is obtained after recrystallization from dry methanol. The crystal structure of SP(NH2)3 has been determined by single crystal X-ray methods (Pbca; a = 922.3(1), b = 953.8(1), c = 1058.4(2) pm, Z = 8). In the crystals the molecules show non-crystallographic point symmetry C8. The P—S bond (195.4(1) pm) is slightly longer than in SPCl3. From P—N bond lengths of about 166 pm a significant electrostatic strengthening of the P—N single bonds is assumed. Weak intermolecular hydrogen bonding interactions (N —H · · · N ≥ 329.5 pm; N — H · · · S ≥ 348.3 pm) are observed.Investigation of thermal properties shows a melting temperature of 115°C for SP(NH2)3. According to combined DTA/TG and MS investigations above this temperature the compound decomposes by evolution of H2S and NH3 to yield amorphous phosphorus(V)nitride.

Morphology of Thin Films of Aromatic Ellagic Acid and Its Hydrogen Bonding Interactions

2020 ◽  
Vol 124 (30) ◽  
pp. 16381-16390
Author(s):  
Eva Bittrich ◽  
Jari Domke ◽  
Dieter Jehnichen ◽  
Lars Bittrich ◽  
Mikhail Malanin ◽  
...  
Keyword(s):  
Thin Films ◽  
Hydrogen Bonding ◽  
Ellagic Acid ◽  
Hydrogen Bonding Interactions
Sign in / Sign up

Export Citation Format

Share Document