Results 31 to 40 of about 186,089 (306)

Iridium Complexes and Clusters in Dealuminated Zeolite HY: Distribution between Crystalline and Impurity Amorphous Regions [PDF]

, 2014
Dealuminated zeolite HY was used to support Ir(CO)_2 complexes formed from Ir(CO)_2(C_5H_7O_2). Infrared and X-ray absorption spectra and atomic resolution electron microscopy images identify these complexes, and the images and ^(27)Al NMR spectra ...
Browning, Nigel D., Chen, Cong-Yan, Gates, Bruce C., Hwang, Son-Jong, Lu, Jing, Martinez-Macias, Claudia, Xu, Pinghong   +6 more
core   +1 more source

Synthesis and Biological Activity of Some New Pyrazoline and Pyrrolo[3,4-c]pyrazole-4,6-dione Derivatives: Reaction of Nitrilimines with Some Dipolarophiles

Molecules, 2008
Several 1,3-diaryl-5-(cyano-, aminocarbonyl- and ethoxycarbonyl-)-2-pyrazoline, pyrrolo[3,4-c]pyrazole-4,6-dione and 1,3,4,5-tetraaryl-2-pyrazoline derivativeswere prepared by the reaction of nitrilimine with different dipolarophilic reagents.
Omar A. Miqdad, Nadia G. Kandile, Hamdi M. Hassaneen, Nada M. Abunada   +3 more
doaj   +1 more source

The abundances of hydrocarbon functional groups in the interstellar medium inferred from laboratory spectra of hydrogenated and methylated polycyclic aromatic hydrocarbons

, 2013
Infrared (IR) absorption spectra of individual polycyclic aromatic hydrocarbons (PAHs) containing methyl (-CH3), methylene (>CH2), or diamond-like *CH groups and IR spectra of mixtures of methylated and hydrogenated PAHs prepared by gas phase ...
Friedrich, Manfred, Henning, Thomas, Huisken, Friedrich, Jäger, Cornelia, Müllen, Klaus, Plass, Winfried, Räder, Hans-Joachim, Steglich, Mathias   +7 more
core   +1 more source

Ab initio studies on complexes formed by melamine and cyclotrione [PDF]

Journal of the Serbian Chemical Society, 2007
Ab initio methods were used to study the binding energies of non-bonded complexes formed by melamine and cyclotrione, with the STO-3G, 3-21G and 6-31G (d) basis sets.
LIANGIANG ZHU, QIWEN TENG, SHI WU
doaj   +3 more sources

A New Derivatives of Benzodiazepine, Imidazole, Isatin, Maleimide, Pyrimidine and 1,2,4-Triazole: Synthesis and Characterization

مجلة بغداد للعلوم, 2008
The synthesis of new benzodiazepine, imidazole, isatin, maleimide, pyrimidine and 1,2,4-triazole derived from 2-amino-4-hydroxy-1,3,5-triazine, via its cyclocondensation reaction with different organic reagents, is described. FT-IR, 1H-NMR and as well as
Baghdad Science Journal
doaj   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Synthesis and Spectroscopic Study of Naphtholic and Phenolic Azo Dyes [PDF]

, 2013
Azo dyes are extremely important in variety of industries for variety of technical purposes. Hence, a series of naphtholic azo dyes 1-9 were synthesized via diazotization of substituted aniline derivatives followed by azo coupling with 2-naphthol.
Ajani, Alice O, Ajani, O. O., Akinremi, O. E., Anake, W. U., Edobor-Osoh, A.   +4 more
core  

Tuning of the luminescence in poly((silanylene)thiophene)s [PDF]

, 1995
Synthetic routes to alternating copolymers consisting of oligosilylene blocks and oligothiophene blocks (T-x; x = 1, 2, 3, 4, or 6 rings) are presented.
Gill, R.E, Hadziioannou, G, Herrema, J.K, Hutten, P.F.van, Wieringa, R.H, Wildeman, J.   +5 more
core   +4 more sources

FT-IR, FT-Raman, NMR spectra and DFT calculations on 4-chloro-N-methylaniline

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2010
In this work, the vibrational spectral analysis was carried out by using FT-IR and FT-Raman spectroscopy in the range 400-4000 and 50-3500cm(-1) respectively, for the title molecule. The structural and spectroscopic data of the molecule in the ground state were calculated by using density functional method using 6-311++G(d,p) basis set. The vibrational
Rani, A. Usha, Sundaraganesan, N., Kurt, M., Cinar, M., Karabacak, M.   +4 more
openaire   +3 more sources

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source