Strong and weak effects caused by non covalent interactions between chloroform and selected electron donor molecules

2011 ◽  
Vol 13 (31) ◽  
pp. 14223 ◽  
Author(s):  
K. S. Rutkowski ◽  
S. M. Melikova ◽  
M. Rospenk ◽  
A. Koll
Keyword(s):  
Electron Donor ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Nitrogen as a pnicogen?: Evidence for π-hole driven novel N…N interaction in nitromethane-ammonia dimers using matrix isolation infrared spectroscopy and ab initio computations

2021 ◽  
Author(s):  
Swaroop Chandra ◽  
B. Suryaprasad ◽  
Nagarajan Ramanathan ◽  
Sundararajan Kalyanasundaram
Keyword(s):  
Infrared Spectroscopy ◽  
Ab Initio ◽  
Electron Donor ◽  
Matrix Isolation ◽  
Non Covalent Interactions ◽  
Ab Initio Computations ◽  
Covalent Interactions

The role of nitrogen, the first member of pnicogen group, as an electron donor in hypervalent non-covalent interactions, has been established long ago, while observation of its electron accepting capability...

scholarly journals Copolymers and Hybrids Based on Carbazole Derivatives and Their Nanomorphology Investigation

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 133 ◽  
Author(s):  
Stefania Aivali ◽  
Sofia Kakogianni ◽  
Charalampos Anastasopoulos ◽  
Aikaterini Andreopoulou ◽  
Joannis Kallitsis
Keyword(s):  
Optical Properties ◽  
Free Radical ◽  
Band Gap ◽  
Electron Donor ◽  
Carbon Nanostructures ◽  
Polymeric Materials ◽  
Covalent Attachment ◽  
Carbazole Derivatives ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Oligomers of the low-band-gap PCDTBT polymer, based on either 3,6 or 2,7 carbazole units, were modified with vinyl ω-chain end functionalities. The vinyl-functionalized oligomers were used as comonomers in free radical polymerizations with quinoline-based monomers such as 6-vinylphenyl-(2-pyridinyl)-4-phenyl-quinoline (vinyl-QPy), and 6-vinylphenyl-(2-perfluorophenyl)-4-phenyl quinoline (vinyl-5FQ). The co-polymeric materials bearing the vinyl-QPy moiety were developed as potential compatibilizers in polymer electron donor–fullerene acceptor blends for non-covalent interactions with the fullerene part. The co-polymeric materials bearing the vinyl-5FQ moiety were developed for the covalent attachment of carbon nanostructures; specifically, PC61BM. Both copolymers and hybrids, after thorough purification, were characterized in terms of their spectroscopic and optical properties as well as their ability to form nanophased separated films as such, or as additives at various percentages into PCDTBT: PC71BM blends.

NON COVALENT INTERACTIONS IN LARGE DIAMONDOID DIMERS IN THE GAS PHASE - A MICROWAVE STUDY

2017 ◽  
Author(s):  
Cristobal Perez ◽  
Melanie Schnell ◽  
Peter Schreiner ◽  
Norbert Mitzel ◽  
Yury Vishnevskiy ◽  
...  
Keyword(s):  
Gas Phase ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Vapour Pressure Isotope Effect on Evaporation from Pure Organic Phases - a PIMD Approach

2020 ◽  
Author(s):  
Luis Vasquez ◽  
Agnieszka Dybala-Defratyka
Keyword(s):  
Path Integral ◽  
Vapour Pressure ◽  
Density Functional ◽  
Isotope Effects ◽  
Tight Binding ◽  
Decomposition Analysis ◽  
Energy Decomposition Analysis ◽  
Special Importance ◽  
Non Covalent Interactions ◽  
Covalent Interactions

<p></p><p>Very often in order to understand physical and chemical processes taking place among several phases fractionation of naturally abundant isotopes is monitored. Its measurement can be accompanied by theoretical determination to provide a more insightful interpretation of observed phenomena. Predictions are challenging due to the complexity of the effects involved in fractionation such as solvent effects and non-covalent interactions governing the behavior of the system which results in the necessity of using large models of those systems. This is sometimes a bottleneck and limits the theoretical description to only a few methods.<br> In this work vapour pressure isotope effects on evaporation from various organic solvents (ethanol, bromobenzene, dibromomethane, and trichloromethane) in the pure phase are estimated by combining force field or self-consistent charge density-functional tight-binding (SCC-DFTB) atomistic simulations with path integral principle. Furthermore, the recently developed Suzuki-Chin path integral is tested. In general, isotope effects are predicted qualitatively for most of the cases, however, the distinction between position-specific isotope effects observed for ethanol was only reproduced by SCC-DFTB, which indicates the importance of using non-harmonic bond approximations.<br> Energy decomposition analysis performed using the symmetry-adapted perturbation theory (SAPT) revealed sometimes quite substantial differences in interaction energy depending on whether the studied system was treated classically or quantum mechanically. Those observed differences might be the source of different magnitudes of isotope effects predicted using these two different levels of theory which is of special importance for the systems governed by non-covalent interactions.</p><br><p></p>

scholarly journals Heterogenisation of polyoxometalates and other metal-based complexes in metal–organic frameworks: from synthesis to characterisation and applications in catalysis

2021 ◽  
Author(s):  
P. Mialane ◽  
C. Mellot-Draznieks ◽  
P. Gairola ◽  
M. Duguet ◽  
Y. Benseghir ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Coordination Complexes ◽  
Metal Organic ◽  
Non Covalent Interactions ◽  
Molecular Catalysts ◽  
Covalent Interactions

This review provides a thorough overview of composites with molecular catalysts (polyoxometalates, or organometallic or coordination complexes) immobilised into MOFs via non-covalent interactions.

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