نتایج جستجو برای: electronic descriptors

تعداد نتایج: 241201  

Hossein Aghaie Shahla Hamedani Shahram Moradi

In this work, the structural and electronic properties of folic acid molecule on functionalized (7,0)zigzag single-walled carbon nanotube was studied in gas phase on the basis of density functionaltheory (DFT). Furthermore, covalent interaction of folic acid with single-walled carbon nanotube wasinvestigated and its quantum molecular descriptors and binding energies were calculated. The DFTB3LY...

2008
Rudolf Kiralj Márcia M. C. Ferreira

Over hundred new a priori global/local molecular descriptors that encoded steric, topological, electronic, hydrogen bonding, compositional and hydrophobic properties were generated for 16 b-lactams, and two partial least squares regression models were constructed and cross-validated. These a priori models (Q > 0.80, R > 0.95, SEV < 0.50) are comparable with the previously obtained computed mode...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده مدیریت و اقتصاد 1391

abstract nowadays, industries cannot play a crucial role in national and international competitions. the tourism industry is no exception. tourism industry development as the most important economic sector and income generation is one of the key challenges of economic development in the world. therefore, countries were successful that take advantage of the capabilities of tourism sector using ...

Journal: :Physical Chemistry Chemical Physics 2021

Non-resonant and resonant photoelectron spectroscopy was used to measure electronic structure descriptors for 60 ionic liquids, allowing the development of design rules predict a further 516 liquids.

2014
Zahra Ghanbari Mohammad R. Housaindokht Mohammad Izadyar Mohammad R. Bozorgmehr Hossein Eshtiagh-Hosseini Ahmad R. Bahrami Maryam M. Matin Maliheh Javan Khoshkholgh

Quantitative structure activity relationship (QSAR) for the anticancer activity of Fe(III)-salen and salen-like complexes was studied. The methods of density function theory (B3LYP/LANL2DZ) were used to optimize the structures. A pool of descriptors was calculated: 1497 theoretical descriptors and quantum-chemical parameters, shielding NMR, and electronic descriptors. The study of structure and...

2008
Raoof Ghavami Amir Najafi Mohammad Sajadi Farhad Djannaty

In order to accurately simulate C NMR spectra of hydroxy, polyhydroxy and methoxy substituted flavonoid a quantitative structure–property relationship (QSPR) model, relating atom-based calculated descriptors to C NMR chemical shifts (ppm, TMS = 0), is developed. A dataset consisting of 50 flavonoid derivatives was employed for the present analysis. A set of 417 topological, geometrical, and ele...

2010
Alexander Entzian Horst Bögel Mirko Buchholz Ulrich Heiser

Nitrogen is one of the most prominent hetero atoms found in heterocycles. The corresponding electron lone pairs of these nitrogen atoms are mainly responsible for properties like the basicity and the pkb-values of the investigated heterocycle. Nevertheless, the overall electronic state of a molecule is also directly related to observable physico-chemical properties. This fact underlines a possi...

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