Redox-triggered reversible modulation of intense near-infrared and visible absorption using paddlewheel-type diruthenium(III) complex

2021 ◽  
Author(s):  
Yusuke Kataoka ◽  
Nanako Imasaki ◽  
Natsumi Yano ◽  
Minoru Mitsumi ◽  
Makoto Handa
Keyword(s):  
Single Crystal ◽  
Near Infrared ◽  
Visible Absorption ◽  
X Ray ◽  
Diruthenium Complex

A new paddlewheel-type diruthenium complex with 2-amino-3-(trifluoromethyl)pyridine (amtfmp) [Ru2(amtfmp)4Cl2] ([1]), which shows intense and characteristic near-infrared (NIR) and visible absorption, has been developed and structurally characterized by single crystal X-ray...

A new form of hydroxyaluminum phthalocyanine by acid treatment. Characterization and photoactivity

1988 ◽  
Vol 66 (7) ◽  
pp. 1609-1616 ◽  
Author(s):  
LÊ H. Dao ◽  
Gérard Perrier ◽  
Kenneth Cole
Keyword(s):  
Acid Treatment ◽  
Near Infrared ◽  
Absorption Spectrometry ◽  
Acid Solutions ◽  
Solar Cell Device ◽  
Visible Absorption ◽  
X Ray ◽  
Photoelectrochemical Solar Cell ◽  
Aqueous Acid ◽  
New Form

A new polymorph of hydroxyaluminum phthalocyanine (PcAlOH) was obtained when PcAlOH thin film was exposed to aqueous acid solutions. The new polymorph, which is characterized by infrared, near-infrared, and visible absorption spectrometry and X-ray diffractometry, shows enhanced photoactivity in a photoelectrochemical solar cell device.

Growth and Magneto-Optical Properties of CaTbAlO4 Crystal

2011 ◽  
Vol 306-307 ◽  
pp. 1722-1727 ◽  
Author(s):  
Man Mei ◽  
Li Li Cao ◽  
Yan He ◽  
Ru Ru Zhang ◽  
Fei Yun Guo ◽  
...  
Keyword(s):  
Optical Properties ◽  
Single Crystal ◽  
Room Temperature ◽  
Near Infrared ◽  
Visible Region ◽  
Czochralski Method ◽  
Optical Devices ◽  
X Ray Diffraction ◽  
X Ray ◽  
Infrared Spectral

The calcium terbium aluminate (CaTbAlO4) single crystal was grown by Czochralski method successfully for the first time.The structure of the crystal was determined by X-ray diffraction analysis.The transmission spectrum of the crystal was measured at room temperature at the wavelength of 400-1500nm.The specific Faraday rotation of the single crystal was surveyed at room temperature at the wavelength 532nm, 633nm, and 1064nm respectively.The Verdet constants of the CaTbAlO4 crystal are calculated and the results show that the Verdet constants of CaTbAlO4 are around 110% higher than that of TGG in the visible and near-infrared spectral region.Therefore,crystal CaTbAlO4 can be promising material for the fabrication of magneto-optical devices in the visible region.

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.

Multimetal lanthanide phosphonocarboxylate frameworks: structure, colour tuning and near-infrared emission

2021 ◽  
Author(s):  
Huiru Jing ◽  
Wenyan Dan ◽  
Jiaxing Zhu ◽  
Yun Ling ◽  
Yu Jia ◽  
...  
Keyword(s):  
Single Crystal ◽  
Dicarboxylic Acid ◽  
Near Infrared ◽  
Infrared Emission ◽  
X Ray ◽  
Colour Tuning ◽  
Near Infrared Emission

A series of isostructural lanthanide phosphonocarboxylate frameworks {(H3O)3[Ln7(pbpdc)6(DMF)4(H2O)3]·4H2O}n (named as LnPCF, Ln = Tb, Eu and Gd, H4pbpdc = 4'-phosphono-[1,1'-biphenyl]-3,5-dicarboxylic acid) were solvothermally synthesized and characterized by single crystal X-ray...

Synthesis, Characterization, and Near-Infrared Photoluminescence of Novel Neodymium(III) Complexes

2004 ◽  
Vol 57 (8) ◽  
pp. 803 ◽  
Author(s):  
Hongshan He ◽  
Wai-Kwok Wong ◽  
Jianping Guo ◽  
King-Fai Li ◽  
Wai-Yeung Wong ◽  
...  
Keyword(s):  
Single Crystal ◽  
Elemental Analysis ◽  
Metal Ion ◽  
Near Infrared ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Tripodal Ligand ◽  
X Ray ◽  
Emission Efficiency ◽  
Photoluminescence Studies

A series of monoporphyrinate neodymium(iii) complexes stabilized by the anionic tripodal ligand hydridotris(pyrazol-1-yl)borate were prepared and characterized. These complexes were characterized by elemental analysis and spectroscopy. The structure of resulting complex was determined by single-crystal X-ray diffraction. The complex crystallized in the monoclinic space group P21/c, with a 13.7347(11), b 27.156(2), c 15.5397(13) Å, β 114.1490(10)°, and V 5288.8(7) Å3. The neodymium(iii) ion is coordinated by four nitrogen atoms from the porphyrinate dianion and three nitrogen atoms from the anionic tripodal ligand. Photoluminescence studies showed that the porphyrinate dianion absorbed light and transferred energy to the Nd3+ centre, a process which then allowed the metal ion to emit efficiently at 885, 900, and 1071 nm. The effects of the substituent and the solvent on emission efficiency were also investigated.

scholarly journals Synthesis and Dual-Mode Electrochromism of Anisotropic Monoclinic Nb12O29 Colloidal Nanoplatelets

2020 ◽  
Author(s):  
Hsin-Che Lu ◽  
Sandeep Ghosh ◽  
Naman Katyal ◽  
Graeme Henkelman ◽  
Vikram S. Lankanpal ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Photoelectron Spectroscopy ◽  
Near Infrared ◽  
Colloidal Synthesis ◽  
Solar Modulation ◽  
Raman Signal ◽  
Dual Mode ◽  
Visible Absorption ◽  
X Ray ◽  
Ion Intercalation

<div>Transition metal oxide nanocrystals with dual-mode electrochromism hold promise for smart windows enabling spectrally selective solar modulation. We have developed the colloidal synthesis of anisotropic monoclinic Nb12O29 nanoplatelets (NPLs) to investigate the dual-mode electrochromism of niobium oxide nanocrystals. The precursor for synthesizing NPLs was prepared by mixing NbCl5 and oleic acid to form a complex that was subsequently heated to form an oxide-like structure capped by oleic acid, denoted as niobium oxo cluster. By initiating the synthesis using niobium oxo clusters, preferred growth of NPLs over other polymorphs was observed. The structure of the synthesized NPLs was examined by X-ray diffraction in conjunction with simulations, revealing that the NPLs are monolayer monoclinic Nb12O29, thin in the [100] direction and extended along the b and c directions. Besides having monolayer thickness, NPLs show decreased intensity of Raman signal from Nb-O bonds with higher bond order when compared to bulk monoclinic Nb12O29, as interpreted by calculations. Progressive electrochemical reduction of NPL films led to absorbance in the near-infrared region (stage 1) followed by absorbance in both the visible and near-infrared regions (stage 2), thus exhibiting dual-mode electrochromism. The mechanisms underlying these two processes were distinguished electrochemically by cyclic voltammetry to determine the extent to which ion intercalation limits the kinetics, and by verifying the presence of localized electrons following ion intercalation using X-ray photoelectron spectroscopy. Both results support that the near-infrared absorption results from capacitive charging and the onset of visible absorption in the second stage is caused by ion intercalation.</div>

scholarly journals Synthesis and Dual-Mode Electrochromism of Anisotropic Monoclinic Nb12O29 Colloidal Nanoplatelets

2020 ◽  
Author(s):  
Hsin-Che Lu ◽  
Sandeep Ghosh ◽  
Naman Katyal ◽  
Graeme Henkelman ◽  
Vikram S. Lankanpal ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Photoelectron Spectroscopy ◽  
Near Infrared ◽  
Colloidal Synthesis ◽  
Solar Modulation ◽  
Raman Signal ◽  
Dual Mode ◽  
Visible Absorption ◽  
X Ray ◽  
Ion Intercalation

<div>Transition metal oxide nanocrystals with dual-mode electrochromism hold promise for smart windows enabling spectrally selective solar modulation. We have developed the colloidal synthesis of anisotropic monoclinic Nb12O29 nanoplatelets (NPLs) to investigate the dual-mode electrochromism of niobium oxide nanocrystals. The precursor for synthesizing NPLs was prepared by mixing NbCl5 and oleic acid to form a complex that was subsequently heated to form an oxide-like structure capped by oleic acid, denoted as niobium oxo cluster. By initiating the synthesis using niobium oxo clusters, preferred growth of NPLs over other polymorphs was observed. The structure of the synthesized NPLs was examined by X-ray diffraction in conjunction with simulations, revealing that the NPLs are monolayer monoclinic Nb12O29, thin in the [100] direction and extended along the b and c directions. Besides having monolayer thickness, NPLs show decreased intensity of Raman signal from Nb-O bonds with higher bond order when compared to bulk monoclinic Nb12O29, as interpreted by calculations. Progressive electrochemical reduction of NPL films led to absorbance in the near-infrared region (stage 1) followed by absorbance in both the visible and near-infrared regions (stage 2), thus exhibiting dual-mode electrochromism. The mechanisms underlying these two processes were distinguished electrochemically by cyclic voltammetry to determine the extent to which ion intercalation limits the kinetics, and by verifying the presence of localized electrons following ion intercalation using X-ray photoelectron spectroscopy. Both results support that the near-infrared absorption results from capacitive charging and the onset of visible absorption in the second stage is caused by ion intercalation.</div>

Electron Microscopy of Shock Loaded Polycrystalline Beryllium

1974 ◽  
Vol 32 ◽  
pp. 506-507 ◽  
Author(s):  
J. M. Galbraith ◽  
L. E. Murr ◽  
A. L. Stevens
Keyword(s):  
Electron Microscopy ◽  
Wave Propagation ◽  
Structural Change ◽  
Single Crystal ◽  
Diffraction Pattern ◽  
Shock Loading ◽  
Slip Systems ◽  
Compression Tests ◽  
X Ray Diffraction ◽  
X Ray

Uniaxial compression tests and hydrostatic tests at pressures up to 27 kbars have been performed to determine operating slip systems in single crystal and polycrystal1ine beryllium. A recent study has been made of wave propagation in single crystal beryllium by shock loading to selectively activate various slip systems, and this has been followed by a study of wave propagation and spallation in textured, polycrystal1ine beryllium. An alteration in the X-ray diffraction pattern has been noted after shock loading, but this alteration has not yet been correlated with any structural change occurring during shock loading of polycrystal1ine beryllium.This study is being conducted in an effort to characterize the effects of shock loading on textured, polycrystal1ine beryllium. Samples were fabricated from a billet of Kawecki-Berylco hot pressed HP-10 beryllium.

Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

2003 ◽  
Vol 218 (5) ◽  
Author(s):  
Süheyla Özbey ◽  
F. B. Kaynak ◽  
M. Toğrul ◽  
N. Demirel ◽  
H. Hoşgören
Keyword(s):  
Crystal Structure ◽  
Inclusion Complex ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

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