scholarly journals X-ray Raman scattering: a new in situ probe of molecular structure during nucleation and crystallization from liquid solutions

CrystEngComm ◽  
2018 ◽  
Vol 20 (43) ◽  
pp. 6871-6884 ◽  
Author(s):  
Laila H. Al-Madhagi ◽  
Sin-Yuen Chang ◽  
Mahalingam Balasubramanian ◽  
Anna B. Kroner ◽  
Elizabeth J. Shotton ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Raman Scattering ◽  
Solute Molecule ◽  
X Ray ◽  
Cooling Crystallization ◽  
Liquid Solutions

X-ray Raman scattering (XRS) has been used for in situ probing of solute molecule speciation in solution during cooling crystallization.

scholarly journals Structural Characterization of Heterodinuclear ZnII-LnIII Complexes (Ln = Pr, Nd) with a Ring-Contracted H2valdien-Derived Schiff Base Ligand

2021 ◽  
Author(s):  
Shabana Noor ◽  
Richard Goddard ◽  
Fehmeeda Khatoon ◽  
Sarvendra Kumar ◽  
Rüdiger W. Seidel
Keyword(s):  
Molecular Structure ◽  
Schiff Base ◽  
Structural Characterization ◽  
Schiff Base Ligand ◽  
Crystal And Molecular Structure ◽  
X Ray ◽  
X Ray Crystallography ◽  
Imidazoline Ring

AbstractSynthesis and structural characterization of two heterodinuclear ZnII-LnIII complexes with the formula [ZnLn(HL)(µ-OAc)(NO3)2(H2O)x(MeOH)1-x]NO3 · n H2O · n MeOH [Ln = Pr (1), Nd (2)] and the crystal and molecular structure of [ZnNd(HL)(µ-OAc)(NO3)2(H2O)] [ZnNd(HL)(OAc)(NO3)2(H2O)](NO3)2 · n H2O · n MeOH (3) are reported. The asymmetrical compartmental ligand (E)-2-(1-(2-((2-hydroxy-3-methoxybenzylidene)amino)-ethyl)imidazolidin-2-yl)-6-methoxyphenol (H2L) is formed from N1,N3-bis(3-methoxysalicylidene)diethylenetriamine (H2valdien) through intramolecular aminal formation, resulting in a peripheral imidazoline ring. The structures of 1–3 were revealed by X-ray crystallography. The smaller ZnII ion occupies the inner N2O2 compartment of the ligand, whereas the larger and more oxophilic LnIII ions are found in the outer O2O2’ site. Graphic Abstract Synthesis and structural characterization of two heterodinuclear ZnII-LnIII complexes (Ln = Pr, Nd) bearing an asymmetrical compartmental ligand formed in situ from N1,N3-bis(3-methoxysalicylidene)diethylenetriamine (H2valdien) through intramolecular aminal formation are reported.

scholarly journals A large-solid-angle X-ray Raman scattering spectrometer at ID20 of the European Synchrotron Radiation Facility

2017 ◽  
Vol 24 (2) ◽  
pp. 521-530 ◽  
Author(s):  
S. Huotari ◽  
Ch. J. Sahle ◽  
Ch. Henriquet ◽  
A. Al-Zein ◽  
K. Martel ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Raman Scattering ◽  
Solid Angle ◽  
European Synchrotron Radiation Facility ◽  
Electronic Excitations ◽  
Raman Scattering Spectroscopy ◽  
X Ray ◽  
Area Detector ◽  
Spectroscopic Tool

An end-station for X-ray Raman scattering spectroscopy at beamline ID20 of the European Synchrotron Radiation Facility is described. This end-station is dedicated to the study of shallow core electronic excitations using non-resonant inelastic X-ray scattering. The spectrometer has 72 spherically bent analyzer crystals arranged in six modular groups of 12 analyzer crystals each for a combined maximum flexibility and large solid angle of detection. Each of the six analyzer modules houses one pixelated area detector allowing for X-ray Raman scattering based imaging and efficient separation of the desired signal from the sample and spurious scattering from the often used complicated sample environments. This new end-station provides an unprecedented instrument for X-ray Raman scattering, which is a spectroscopic tool of great interest for the study of low-energy X-ray absorption spectra in materials under in situ conditions, such as in operando batteries and fuel cells, in situ catalytic reactions, and extreme pressure and temperature conditions.

High pressure studies of Ni3[(C2H5N5)6(H2O)6](NO3)6·1.5H2O by Raman scattering, IR absorption, and synchrotron X-ray diffraction

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 65031-65037 ◽  
Author(s):  
Junru Jiang ◽  
Jianguo Zhang ◽  
Peifen Zhu ◽  
Jianfu Li ◽  
Xiaoli Wang ◽  
...  
Keyword(s):  
Molecular Structure ◽  
High Pressure ◽  
Raman Scattering ◽  
Ir Absorption ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Pressure Studies

Molecular structure (a) and packing diagram (b) of 1. The green, grey, blue, red, and white spheres denote Ni, C, N, O, and H atoms, respectively.

scholarly journals X-Ray Single Crystal Structural Analysis of Magnetically Oriented Microcrystals

2014 ◽  
Vol 70 (a1) ◽  
pp. C1138-C1138
Author(s):  
Chiaki Tsuboi ◽  
Kazuki Aburaya ◽  
Shingo Higuchi ◽  
Fumiko Kimura ◽  
Masataka Maeyama ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Single Crystal ◽  
Three Dimensional ◽  
Diffraction Measurement ◽  
X Ray Diffraction ◽  
Data Set ◽  
Uv Curable ◽  
X Ray

We have developed magnetically oriented microcrystal array (MOMA) technique that enables single crystal X-ray diffraction analyses from microcrystalline powder. In this method, microcrystals suspended in a UV-curable monomer matrix are there-dimensionally aligned by special rotating magnetic field, followed by consolidation of the matrix by photopolymerization. From thus achieved MOMAs, we have been succeeded in crystal structure analysis for some substances [1, 2]. Though MOMA method is an effective technique, it has some problems as follows: in a MOMA, the alignment is deteriorated during the consolidation process. In addition, the sample microcrystals cannot be recovered from a MOMA. To overcome these problems, we performed an in-situ X-ray diffraction measurement using a three-dimensional magnetically oriented microcrystal suspension (3D MOMS) of L-alanine. An experimental setting of the in-situ X-ray measurement of MOMS is schematically shown in the figure. L-alanine microcrystal suspension was poured into a glass capillary and placed on the rotating unit equipped with a pair of neodymium magnets. Rotating X-ray chopper with 10°-slits was placed between the collimator and the suspension. By using this chopper, it was possible to expose the X-ray only when the rotating MOMS makes a specific direction with respect to the impinging X-ray. This has the same effect as the omega oscillation in conventional single crystal measurement. A total of 22 XRD images of 10° increments from 0° to 220° were obtained. The data set was processed by using conventional software to obtain three-dimensional molecular structure of L-alanine. The structure is in good agreement with that reported for the single crystal. R1 and wR2 were 6.53 and 17.4 %, respectively. RMSD value between the determined molecular structure and the reported one was 0.0045 Å. From this result, we conclude that this method can be effective and practical to be used widely for crystal structure analyses.

scholarly journals X-ray Raman scattering for bulk chemical and structural insight into green carbon

2020 ◽  
Vol 22 (33) ◽  
pp. 18435-18446
Author(s):  
Luke J. R. Higgins ◽  
Christoph J. Sahle ◽  
Mahalingam Balasubramanian ◽  
Bhoopesh Mishra
Keyword(s):  
Raman Scattering ◽  
X Ray ◽  
Bulk Chemical ◽  
Structural Insight ◽  
Insight Into ◽  
Absorption Edges

X-ray Raman scattering (XRS) spectroscopy provides access to element-specific core photo-absorption edges of low Z-elements (e.g. K-edges of C, N, O), using hard X-ray photons enabling bulk and in situ study of green carbons.

Digold(I) Complexes Derived from 5,5′-Bibenzimidazolin-2-ylidene Ligands

2014 ◽  
Vol 69 (11-12) ◽  
pp. 1248-1252 ◽  
Author(s):  
Mareike C. Jahnke ◽  
Christian Schulte to Brinke ◽  
F. Ekkehardt Hahn
Keyword(s):  
Molecular Structure ◽  
Silver Oxide ◽  
Silver Complexes ◽  
X Ray Diffraction ◽  
Gold Complexes ◽  
Metal Centers ◽  
X Ray ◽  
Steric Crowding ◽  
Aurophilic Interactions

Abstract The 5,5′-bibenzimidazolium dibromide salts 2 and 3 have been prepared by fourfold N-alkylation of 5,5′-bibenzimidazole (2: R=Pr; 3: R=Bu). The diazolium salts were treated with silver oxide, and the in situ-formed silver complexes were subsequently reacted with [AuCl(SMe2)] to give the dinuclear gold complexes 4 and 5. The molecular structure of complex 5 has been determined by X-ray diffraction showing linearly coordinated gold(I) centers and, most likely due to steric crowding around the metal centers, no aurophilic interactions.

Structural properties of ammonium iodide under high pressure

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 40336-40340 ◽  
Author(s):  
Yanping Huang ◽  
Xiaoli Huang ◽  
Lu Wang ◽  
Gang Wu ◽  
Defang Duan ◽  
...  
Keyword(s):  
High Pressure ◽  
Raman Scattering ◽  
Structural Properties ◽  
Ammonium Iodide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pressure Behavior

The high-pressure behavior of ammonium iodide (NH4I) has been investigated by in situ synchrotron X-ray diffraction (XRD) and Raman scattering up to 40 GPa.

Sign in / Sign up

Export Citation Format

Share Document