title: First principles study for the key electronic, optical and nonlinear optical properties of novel donor-acceptor chalcones.
abstract: Using first-principle methods, several key electronic, optical and nonlinear optical properties are calculated for two recently synthesized chalcone derivatives i.e. (2E)-3-(4-methylphenyl)-1-(3-nitrophenyl)prop-2-en-1-one (comp.1) and (2E)-3-[4-(dimethylamino)phenyl]-1-(3-nitrophenyl)prop-2-en-1-one (comp.2). The calculation of dipole moment, polarizability <α>, anisotropy of polarizability as well as second hyperpolarizability (usually considered as a signature for two photon absorption phenomenon) are performed using density functional theory methods at PBE0/6-311G** level of theory. The linear average polarizability <α> for comp.1 and comp.2 are found to be 32.15×10-24and 38.76×10-24esu, respectively. Similarly, the second hyperpolarizability <γ> amplitudes of comp.1 and comp.2 are found to be reasonably larger mounting to 79.31×10-36and 181.36×10-36esu, respectively. The importance of donor end is determined by comparing p-methylphenyl group of comp.1 with that of N,N-dimethylaniline group of comp.2 that results a remarkable increase in its <γ> amplitude, which is ∼2 times larger as compared with that of comp.1 owing to the stronger donor-acceptor configuration of comp.2. Interestingly, a comparison of average static third-order nonlinear polarizabilities <γ> shows that <γ> amplitudes of comp.1 and comp.2 are ∼13 times and ∼29 times larger than that of para-nitroaniline (a typical standard push-pull NLO-phore) at the same PBE0/6-311G** level of theory, which indicates a real time NLO application of our titled compounds. Time dependent density functional theory (TD-DFT) calculations along with frontier molecular orbitals, density of states (DOS), second hyperpolarizability density analysis and molecular electrostatic potential (MEP) diagrams are used to trace the origin of electro-optical as well as structure property relationships.
authors.affiliation: Institute of Functional Materials Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People's Republic of China; Department of Physics, Faculty of Science, King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia; Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia. Electronic address: mshabbir@kku.edu.sa.
authors.forename: Shabbir
authors.initials: S
authors.lastname: Muhammad
authors.affiliation: Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia; Department of Chemistry, Faculty of Science, King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia.
authors.forename: Abdullah G
authors.initials: AG
authors.lastname: Al-Sehemi
authors.affiliation: Institute of Functional Materials Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People's Republic of China.
authors.forename: Zhongmin
authors.initials: Z
authors.lastname: Su
authors.affiliation: Institute of Functional Materials Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People's Republic of China. Electronic address: hlxu@nenu.edu.cn.
authors.forename: Hongliang
authors.initials: H
authors.lastname: Xu
authors.affiliation: Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia; Department of Chemistry, Faculty of Science, King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Irfan
authors.affiliation: Department of Physics, Faculty of Science, King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia; Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia.
authors.forename: Aijaz Rasool
authors.initials: AR
authors.lastname: Chaudhry
mesh_terms: D016880:Anisotropy; D047188:Chalcones / Q000737:chemistry*; D004583:Electrons; D008958:Models, Molecular; D008968:Molecular Conformation; D017711:Nonlinear Dynamics; D055620:Optical Phenomena; D013055:Spectrophotometry, Infrared; D055672:Static Electricity
chemical_list: D047188:Chalcones
keywords: Chalcones; Density of states; Nonlinear optical properties; Second hyperpolarizability; Second hyperpolarizability density analysis