scholarly journals Structural Transformation from Trinuclear Linear to Tetranuclear Cubane Heterobimetallic Selenium Compounds. Structure and Optical Linearities of [Et4N]2[(μ-WSe4)(CuCl)2]

2009 ◽  
Vol 64 (2) ◽  
pp. 209-214 ◽  
Author(s):  
Shu-Lei Liu ◽  
Taike Duan ◽  
Qian-Feng Zhang ◽  
Wa-Hung Leung

Reactions of [Et4N]2[WSe4] with two equivalents of [CuX] powder gave trinuclear linear compounds [Et4N]2[(μ-WSe4)(CuX)2] (X = Cl 1, Br 2). Treatment of 1 or 2 with PPh3 in CH2Cl2 resulted in the formation of tetranuclear cubane-like compounds (μ3-X)(μ3-WSe4)(CuPPh3)3 (X = Cl 3, Br 4). The structures of the heterobimetallic selenium compounds 1 and 4・MeCN were confirmed by single-crystal X-ray diffraction. The nonlinear optical properties of 1 were investigated at λ = 532 nm with a pulse width of 7 ns

2019 ◽  
Vol 28 (03) ◽  
pp. 1950028
Author(s):  
A. Arputha Latha ◽  
M. Anbuchezhiyan

Optically transparent good quality single crystal of 3-Aminonitrobenzene (3-ANB) was grown by slow evaporation technique using methanol as solvent. The grown crystal was subjected to single crystal X-ray diffraction analysis in order to reveal its cell parameters, crystal structure and space group. Powder X-ray diffraction analysis was carried out in order to verify the crystalline nature. UV-Vis study was carried out to measure the optical transparency of the title material and also optical band gap was determined from the transmittance window. The existence of second harmonic generation (SHG) in the title material was confirmed by Kurtz–Perry powder technique. In order to throw light on the crystal structure, linear and nonlinear optical properties at molecular level, Density Functional Theory (DFT) was employed using B3LYP/6[Formula: see text]G (d, p) level of basis set. The DFT study illustrates the HOMO–LUMO energy gap analysis and the existence of SHG behavior of 3-ANB at molecular level.


2000 ◽  
Vol 218 (1) ◽  
pp. 98-102 ◽  
Author(s):  
D.Y Zhang ◽  
H.Y Shen ◽  
W Liu ◽  
W.Z Chen ◽  
G.F Zhang ◽  
...  

2021 ◽  
Author(s):  
Sivasubramani Vediyappan ◽  
Arumugam Raja ◽  
Ro Mu Jauhar ◽  
Ramachandran Kasthuri ◽  
Vishwanathan Vijayan ◽  
...  

Abstract 2-amino-5-nitropyridine 4-chlorobenzoic acid (1:1) (2A5NP4CBA), a potentially useful organic adduct compound has been synthesized and grown as optically transparent single crystals by conventional slow evaporation solution technique (SEST) for the first time in the literature. The formation of the new crystalline material was confirmed by the single-crystal X-ray diffraction (SXRD) analysis and the crystal structure of the grown crystal was found to be monoclinic. Fourier transform infrared (FTIR) spectrum has been recorded by the KBr pellet technique to determine the various vibrational functional groups in the title material. The powder X-ray diffraction (PXRD) and high-resolution X-ray diffraction (HRXRD) analyses have been carried out and the obtained results reveal that the grown crystal has a single-phase and is free from structural grain boundaries. The obtained less value (32 arc-s) of full width at half maximum (FWHM) for (001) plane indicates the excellent crystalline quality of the title 2A5NP4CBA single crystal. The linear optical properties were evaluated by the UV-vis-NIR absorption and transmittance analyses and the obtained results reveal that the grown crystal possesses more than 70% of optical transmittance window with the cut-off edge at 419 nm. The thermal analysis discloses that the grown crystal possesses good thermal stability of about 187°C. To determine the appropriateness of the grown crystal for the high-power laser application, laser damage threshold (LDT) analysis has been carried out by Nd: YAG laser of a wavelength of 1064 nm. The third-order nonlinear optical coefficients such as nonlinear absorption (β), nonlinear refraction (n 2 ) and nonlinear susceptibility (χ (3) ) have been evaluated by utilizing the single beam Z-scan technique using a solid-state laser of wavelength 532 nm. The calculated ꭓ (3) value is found to be reasonably good compared to other organic single crystals which are reported in the literature. The optical limiting (OL) behavior of the title crystal was evaluated using a solid-state laser at 532 nm and the limiting threshold was found to be 7.8 mW/cm 2 .


2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hai-Wei Kuai ◽  
Xiao-Chun Cheng ◽  
Xiao-Hong Zhu

Abstract The two enantiopure chiral organic ligands 2-[(S)-4-isopropyl-2-oxazolyl]quinoline (L1) and 2-[(S)-4-benzyl-2-oxazolyl]quinoline (L2) react with different silver salts to give rise to three new silver complexes [Ag(L1)2](SbF6) (1), [Ag(L1)(CH3CN)](ClO4) (2), and [Ag(L2)(NO3)] (3), which have been characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental and thermogravimetric analyses. Complexes 1–3 all display discrete mononuclear structures. The nonlinear optical properties of 1–3 were investigated.


2021 ◽  
Vol 22 (16) ◽  
pp. 8419
Author(s):  
Irena Matulková ◽  
Ivana Císařová ◽  
Michaela Fridrichová ◽  
Róbert Gyepes ◽  
Petr Němec ◽  
...  

Seven inorganic salts containing N-phenylbiguanide as a prospective organic molecular carrier of nonlinear optical properties were prepared and studied within our research of novel hydrogen-bonded materials for nonlinear optics (NLO). All seven salts, namely N-phenylbiguanidium(1+) nitrate (C2/c), N-phenylbiguanidium(1+) perchlorate (P-1), N-phenylbiguanidium(1+) hydrogen carbonate (P21/c), bis(N-phenylbiguanidium(1+)) sulfate (C2), bis(N-phenylbiguanidium(1+)) hydrogen phosphate sesquihydrate (P-1), bis(N-phenylbiguanidium(1+)) phosphite (P21), and bis(N-phenylbiguanidium(1+)) phosphite dihydrate (P21/n), were characterised by X-ray diffraction (powder and single-crystal X-ray diffraction) and by vibrational spectroscopy (FTIR and Raman). Two salts with non-centrosymmetric crystal structures—bis(N-phenylbiguanidium(1+)) sulfate and bis(N-phenylbiguanidium(1+)) phosphite—were further studied to examine their linear and nonlinear optical properties using experimental and computational methods. As a highly SHG-efficient and phase-matchable material transparent down to 320 nm and thermally stable to 483 K, bis(N-phenylbiguanidium(1+)) sulfate is a promising novel candidate for NLO.


2014 ◽  
Vol 769 ◽  
pp. 64-71 ◽  
Author(s):  
Blanca M. Muñoz-Flores ◽  
Rosa Santillán ◽  
Norberto Farfán ◽  
Violeta Álvarez-Venicio ◽  
Víctor M. Jiménez-Pérez ◽  
...  

2021 ◽  
Vol 573 (1) ◽  
pp. 52-62
Author(s):  
Siddique Aneesa-Fatema ◽  
Y. B. Rasal ◽  
R. N. Shaikh ◽  
M. D. Shirsat ◽  
S. S. Hussaini ◽  
...  

RSC Advances ◽  
2014 ◽  
Vol 4 (76) ◽  
pp. 40152-40160 ◽  
Author(s):  
Irene Papagiannouli ◽  
Athanasios B. Bourlinos ◽  
Aristides Bakandritsos ◽  
Stelios Couris

Nanodiamonds (NDs) and carbon-dots (CDs) suspensions exhibit significant NLO response under both ps and ns laser excitation. NDs exhibit important optical limiting action under nanosecond visible (532 nm) and infrared (1064 nm) laser excitation.


Sign in / Sign up

Export Citation Format

Share Document