scholarly journals Oxygen-17 NMR Study of the Uranyl Ion. II. Correlation between17O NMR Chemical Shifts and Wavelengths of UV-Visible Absorption Bands of Uranyl Complexes

1985 ◽  
Vol 58 (3) ◽  
pp. 938-942 ◽  
Author(s):  
Woo-Sik Jung ◽  
Hiroshi Tomiyasu ◽  
Hiroshi Fukutomi
Keyword(s):  
Chemical Shifts ◽  
Uranyl Ion ◽  
Absorption Bands ◽  
Visible Absorption ◽  
Uranyl Complexes ◽  
Nmr Chemical Shifts ◽  
Nmr Study ◽  
Uv Visible

Meso-aryl-ß-pyrrolic positions interactions in meso-tetraarylporphyrins: Flat arylporphyrins and building blocks for oligoporphyrins

2004 ◽  
Vol 08 (02) ◽  
pp. 111-119 ◽  
Author(s):  
Henry J. Callot ◽  
Romain Ruppert ◽  
Christophe Jeandon ◽  
Sébastien Richeter
Keyword(s):  
Building Blocks ◽  
Absorption Bands ◽  
Visible Absorption ◽  
Aryl Ring ◽  
Porphyrin Macrocycle ◽  
Uv Visible

Aryl groups bound to the meso positions of porphyrins often react with neighboring groups, in particular ß-acyl groups to give highly diversified monomeric and dimeric new functionalized porphyrins. The products, whose meso-aryl ring approaches coplanarity with the porphyrin macrocycle, show large shifts of UV-visible absorption bands and various potentialities for building external chelating moieties and assembling oligoporphyrins.

scholarly journals A 195Pt NMR study on zero-magnetic-field splitting and the phosphorescence properties in the excited triplet states of cyclometalated platinum(ii) complexes

2020 ◽  
Vol 49 (19) ◽  
pp. 6363-6367
Author(s):  
Soichiro Akagi ◽  
Sho Fujii ◽  
Noboru Kitamura
Keyword(s):  
Magnetic Field ◽  
Metal Complexes ◽  
Chemical Shifts ◽  
Zero Magnetic Field ◽  
Triplet States ◽  
Field Splitting ◽  
Excited Triplet ◽  
Nmr Chemical Shifts ◽  
Nmr Study ◽  
Excited Triplet States

The strength of zero-magnetic-field splitting in the excited triplet states of metal complexes is reflected in the metal NMR chemical shifts.

C-13 NMR chemical shifts and visible absorption spectra of unsymmetrical fluoran dye by MO calculations

2002 ◽  
Vol 602-603 ◽  
pp. 381-388 ◽  
Author(s):  
T Hoshiba ◽  
T Ida ◽  
M Mizuno ◽  
T Otsuka ◽  
K Takaoka ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Chemical Shifts ◽  
Mo Calculations ◽  
Visible Absorption ◽  
Nmr Chemical Shifts

scholarly journals A New Non-Centrosymmetricorganotin (IV) Hybrid Compound C5H14N2 [SnCl6] 2H2O: Crystal Structure And Optical Study Characterization

2021 ◽  
Author(s):  
Nejeh Hannachi ◽  
Thierry ROISNEL ◽  
Faouzi HLEL
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Optical Band Gap ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
Hybrid Compound ◽  
Visible Absorption ◽  
X Ray ◽  
Uv Visible ◽  
Absorption Measurements

Abstract A new non-centrosymmetricorganotin (IV) hybrid compoundC5H14N2 [SnCl6] 2H2O was determined by single crystal X-ray diffraction at 150(2) K. Its crystal structure was solved by single crystal X-ray diffraction reveling that compound crystallizes in the orthorhombic system with Pbca space group with the following lattice parameters: a = 12.1486 (15) Å, b= 15.4571 (17) Å, c = 16.7610 (18) Å with Z = 8. The bonding between inorganic and organic entities in the compounds is realized by hydrogen bonding O−H…O ,O−H…Cl , NH • • • Cl, N-H…Cl and O−H…Cl. Finally,UV-visible absorption measurements exhibit two absorption bands (226 nm and 262 nm).The optical band gap (Eg) is deduced to be 3.46 Ev.

scholarly journals Carbon-13 NMR Chemical Shift of Methyl Group: A Useful Parameter for Structural Analysis of C-Methylated Flavonoids

2006 ◽  
Vol 1 (11) ◽  
pp. 1934578X0600101
Author(s):  
Pawan K. Agrawal ◽  
Chandan Agrawal ◽  
Shravan Agrawal
Keyword(s):  
Structural Analysis ◽  
Chemical Shift ◽  
Chemical Shifts ◽  
Nmr Chemical Shift ◽  
Methyl Group ◽  
Nmr Chemical Shifts ◽  
Nmr Study ◽  
Pterocarpus Santalinus ◽  
Group A ◽  
C Nmr

The 13C NMR resonances corresponding to the C-Me group of C-6 and/or C-8 C-methylated-flavonoids absorb between 6.7–10.0 ppm and typically between 6.7–8.7 ppm. A comparative 13C NMR study reflects that the 13C NMR chemical shifts reported for 6-hydroxy-5-methyl-3′,4′,5′-trimethoxyaurone-4-O-α-L-rhamnoside from Pterocarpus santalinus and 8-C-methyl-5,7,2′,4′- tetramethoxyflavanone from Terminalia alata are inconsistent with the assigned structures, and therefore need reconsideration.

scholarly journals The UV-visible absorption cross-sections of IONO<sub>2</sub>

2002 ◽  
Vol 2 (3) ◽  
pp. 227-234 ◽  
Author(s):  
J. C. Mössinger ◽  
D. M. Rowley ◽  
R. A. Cox
Keyword(s):  
Cross Sections ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Absorption Bands ◽  
Visible Absorption ◽  
Time Resolved ◽  
Model Calculations ◽  
Solar Photolysis ◽  
Uv Visible

Abstract. The UV-visible absorption spectrum of gaseous IONO2 has been measured over the wavelength range 245--415 nm using the technique of laser photolysis with time-resolved UV-visible absorption spectroscopy. IONO2 was produced in situ in the gas phase by laser flash photolysis of NO2/CF3I/N2 mixtures. Post flash spectra were deconvolved to remove contributions to the observed absorption from other reactant and product species. The resulting spectrum attributed to IONO2 consists of several overlapping broad absorption bands. Assuming a quantum yield of unity for IONO2 photolysis, model calculations show that during sunlit hours at noon, 53° N, the first order solar photolysis rate coefficient (J value) for IONO2 is 4.0 x 10-2 s-1.

Ag-Fe Alloy Nanoparticles Embedded in Polyaniline Nanocomposite Thin Films for E. coli Monitoring Sensor

2015 ◽  
Vol 1119 ◽  
pp. 101-105 ◽  
Author(s):  
Huda Abdullah ◽  
Norshafadzila Mohammad Naim ◽  
Noor Azwen Noor Azmy ◽  
Akrajas Ali Umar ◽  
Aidil Abdul Hamid ◽  
...  
Keyword(s):  
Thin Films ◽  
Bimetallic Nanoparticles ◽  
Oxidative Polymerization ◽  
Reduction Process ◽  
Alloy Nanoparticles ◽  
Absorption Bands ◽  
Visible Absorption ◽  
E Coli ◽  
Nanocomposite Thin Films ◽  
Uv Visible

The nanocomposite of polyaniline (PANI) and bimetallic nanoparticles of silver and iron were prepared by the oxidative polymerization of aniline and the reduction process of bimetallic compound with the presence of nitric acid and PVA. The nanocomposite thin films in various compositions were deposited using spin-coating technique. The films were characterized by UV-visible spectroscopy to study the optical and structural properties. The microphotograph from TEM image shows the nanospherical of Ag-Fe alloy particles in 5 – 25 nm diameter size. The sensitivity performance was tested using I-V measurement to obtain the changes of resistivity before and after the incubation with E. coli bacteria in water. UV-visible absorption bands show the single absorbance peak at 422 – 424 nm in each band indicating the Ag-Fe alloy nanoparticles form. I-V characteristic shows the sample which contains Fe-rich Ag-Fe alloy performed high sensitivity on E. coli.

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