Oxy-fluorophosphate glass doped SmO3+ as solid state dosimeter via spectroscopic techniques

Solid-state NMR has proven to be a versatile technique for studying the chemical structure, 3D structure and dynamics of all sorts of chemical compounds. In nanotechnology and particularly in thin films, the study of chemical modification, molecular packing, end chain motion, distance determination and solvent-matrix interactions is essential for controlling the final product properties and applications. Despite its atomic-level research capabilities and recent technical advancements, solid-state NMR is still lacking behind other spectroscopic techniques in the field of thin films due to the underestimation of NMR capabilities, availability, great variety of nuclei and pulse sequences, lack of sensitivity for quadrupole nuclei and time-consuming experiments. This article will comprehensively and critically review the work done by solid-state NMR on different types of thin films and the most advanced NMR strategies, which are beyond conventional, and the hardware design used to overcome the technical issues in thin-film research.

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Thermal Inkjet Application in the Preparation of Oral Dosage Forms: Dispensing of Prednisolone Solutions and Polymorphic Characterization by Solid-State Spectroscopic Techniques

Journal of Pharmaceutical Sciences ◽

10.1002/jps.21189 ◽

2008 ◽

Vol 97 (7) ◽

pp. 2619-2636 ◽

Cited By ~ 70

Author(s):

Peter A. Meléndez ◽

Kevin M. Kane ◽

Claudine S. Ashvar ◽

Mary Albrecht ◽

Pamela A. Smith

Keyword(s):

Solid State ◽

Dosage Forms ◽

Oral Dosage ◽

Spectroscopic Techniques ◽

Oral Dosage Forms

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Complexations of 2-thiouracil and 2,4-dithiouracil with Cd(SeCN)2and Hg(SeCN)2: NMR and anti-bacterial activity studies

Spectroscopy An International Journal ◽

10.1155/2011/586046 ◽

2011 ◽

Vol 25 (3-4) ◽

pp. 187-195 ◽

Cited By ~ 1

Author(s):

M. Nasiruzzaman Shaikh ◽

Bassem A. Al-Maythalony ◽

Mohammed I. M. Wazeer ◽

Anvarhusein A. Isab

Keyword(s):

Escherichia Coli ◽

Staphylococcus Aureus ◽

Pseudomonas Aeruginosa ◽

Solid State ◽

Salmonella Typhi ◽

Bacterial Activity ◽

Spectroscopic Techniques ◽

Standard Type ◽

Nmr Data ◽

C Nmr

Cadmium and mercury selenocyanate complexes of 2-thiouracil (TU) and 2,4-dithiouracil (DTU) ligands have been synthesized to form complexes of the type [M(SeCN)2(TU)] and [M(SeCN)2(DTU)] (where M is Cd2+or Hg2+) and studied by various spectroscopic techniques such as IR,1H and13C NMR in solution and in the solid state for13C,15N, and113Cd nuclei. Based on IR, and solution and solid-state13C NMR data, stronger cadmium bonding to the thiouracil was observed compared to that of mercury. Anti-bacterial activities of these complexes have been investigated with standard type culture ofEscherichia coli(MTCC 443),Klebsiella pneumoniae(MTCC 109),Pseudomonas aeruginosa(MTCC 1688),Salmonella typhi(MTCC 733) andStaphylococcus aureus(MTCC 737) and show that ligands exhibit more anti-bacterial activities than that of the corresponding Cd(II) and Hg(II) complexes.

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Positively charged polysilsesquioxane/iodide lonic liquid as a quasi solid-state redox electrolyte for dye-sensitized photo electrochemical cells: Infrared,29SiNMR, and electrical studies

International Journal of Photoenergy ◽

10.1155/ijp/2006/23703 ◽

2006 ◽

Vol 2006 ◽

pp. 1-8 ◽

Cited By ~ 8

Author(s):

Vasko Jovanovski ◽

Boris Orel ◽

Robi Ješe ◽

Gregor Mali ◽

Elias Stathatos ◽

...

Keyword(s):

Solid State ◽

Specific Conductivity ◽

Sol Gel ◽

Electrochemical Cells ◽

Spectroscopic Techniques ◽

Reaction Products ◽

Dye Sensitized ◽

Redox Electrolyte ◽

Grotthus Mechanism ◽

Positively Charged

A new sol-gel precursor based on 1-methyl-3-[3-(trimethoxy-λ4-silyl)propyl]-1H-imidazolium iodide (MTMSPI+I−) was synthesized and investigated as a potential novel quasi solid-state ionic liquid redox electrolyte for dye-synthesized photoelectrochemical (DSPEC) cells of the Graetzel type. MTMSPI+I−was hydrolyzed with acidified water and the reaction products of the sol-gel condensation reactions assessed with the help of29SiNMR and infrared spectroscopic techniques. Results of the time-dependent spectra analyses showed the formation of positively charged polyhedral cube-like silsesquioxane species that still contained a small amount of silanol end groups, which were removed after heating at200°C. After cooling, the resulting material formed is a tough, yellowish, and transparent solid, which could be reheated again and used for assembling DSPEC cells. The addition of iodine increased the specific conductivity of the hydrolyzed and nonhydrolyzed MTMSPI+I−, which we attributed to the formation of triiodide ions contributed to the conductivity via the Grotthus mechanism. DSPEC cells based on a titania-dye system with MTMSPI+I−electrolyte containing iodine (0.1 M) reached an overall efficiency between 3.3–3.7%.

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Solid-state reaction synthesis for mixed-phase Eu3+-doped bismuth molybdate and its luminescence properties

Modern Physics Letters B ◽

10.1142/s0217984917502414 ◽

2017 ◽

Vol 31 (26) ◽

pp. 1750241 ◽

Cited By ~ 3

Author(s):

Danyang Liang ◽

Yu Ding ◽

Nan Wang ◽

Xiaomeng Cai ◽

Jia Li ◽

...

Keyword(s):

Solid State ◽

Solid State Reaction ◽

Phase Structure ◽

Vital Role ◽

Mixed Phase ◽

Spectroscopic Techniques ◽

Photoluminescence Properties ◽

X Ray Diffraction ◽

Bismuth Molybdate ◽

Bismuth Molybdates

A method for mixed-phase bismuth molybdate doped with Eu[Formula: see text] ions was developed by solid-state reaction assisting with polyvinyl alcohol (PVA). The results of powder X-ray diffraction showed a mixed-phase structure and the microscopical characterization technology revealed the formation process with the addition of PVA. As a structure inducer, the PVA molecules played a vital role in the formation of phase structure. The as-obtained Eu[Formula: see text]-doped bismuth molybdates were also characterized by using different spectroscopic techniques including FTIR and photoluminescence (PL). The results show that doping concentration, PVA addition and calcination temperature affect photoluminescence properties remarkably.

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The role of π–π stacking and hydrogen-bonding interactions in the assembly of a series of isostructural group IIB coordination compounds

Acta Crystallographica Section C Structural Chemistry ◽

10.1107/s2053229618018314 ◽

2019 ◽

Vol 75 (2) ◽

pp. 178-188 ◽

Cited By ~ 6

Author(s):

Taraneh Hajiashrafi ◽

Roghayeh Zekriazadeh ◽

Keith J. Flanagan ◽

Farnoush Kia ◽

Antonio Bauzá ◽

...

Keyword(s):

Hydrogen Bonding ◽

Solid State ◽

Coordination Compounds ◽

Spectroscopic Techniques ◽

Stacking Interactions ◽

X Ray Crystallography ◽

Hydrogen Bonding Interactions ◽

Π Stacking ◽

Research Domain

The supramolecular chemistry of coordination compounds has become an important research domain of modern inorganic chemistry. Herein, six isostructural group IIB coordination compounds containing a 2-{[(2-methoxyphenyl)imino]methyl}phenol ligand, namely dichloridobis(2-{(E)-[(2-methoxyphenyl)azaniumylidene]methyl}phenolato-κO)zinc(II), [ZnCl2(C28H26N2O4)], 1, diiodidobis(2-{(E)-[(2-methoxyphenyl)azaniumylidene]methyl}phenolato-κO)zinc(II), [ZnI2(C28H26N2O4)], 2, dibromidobis(2-{(E)-[(2-methoxyphenyl)azaniumylidene]methyl}phenolato-κO)cadmium(II), [CdBr2(C28H26N2O4)], 3, diiodidobis(2-{(E)-[(2-methoxyphenyl)azaniumylidene]methyl}phenolato-κO)cadmium(II), [CdI2(C28H26N2O4)], 4, dichloridobis(2-{(E)-[(2-methoxyphenyl)azaniumylidene]methyl}phenolato-κO)mercury(II), [HgCl2(C28H26N2O4)], 5, and diiodidobis(2-{(E)-[(2-methoxyphenyl)azaniumylidene]methyl}phenolato-κO)mercury(II), [HgI2(C28H26N2O4)], 6, were synthesized and characterized by X-ray crystallography and spectroscopic techniques. All six compounds exhibit an infinite one-dimensional ladder in the solid state governed by the formation of hydrogen-bonding and π–π stacking interactions. The crystal structures of these compounds were studied using geometrical and Hirshfeld surface analyses. They have also been studied using M06-2X/def2-TZVP calculations and Bader's theory of `atoms in molecules'. The energies associated with the interactions, including the contribution of the different forces, have been evaluated. In general, the π–π stacking interactions are stronger than those reported for conventional π–π complexes, which is attributed to the influence of the metal coordination, which is stronger for Zn than either Cd or Hg. The results reported herein might be useful for understanding the solid-state architecture of metal-containing materials that contain M II X 2 subunits and aromatic organic ligands.

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Raman and Terahertz Spectroscopic Investigation of Cocrystal Formation Involving Antibiotic Nitrofurantoin Drug and Coformer 4-aminobenzoic Acid

10.20944/preprints201611.0008.v1 ◽

2016 ◽

Author(s):

Yong Du ◽

Qiang Cai ◽

Jiadan Xue ◽

Qi Zhang

Keyword(s):

Solid State ◽

Spectroscopic Techniques ◽

Vibrational Modes ◽

Active Pharmaceutical Ingredients ◽

Aminobenzoic Acid ◽

Parent Materials ◽

Pharmaceutical Development ◽

Pharmaceutical Ingredients ◽

Pharmaceutical Cocrystal ◽

Rich Information

Cocrystallizaiton could improve most physicochemical properties of specific active pharmaceutical ingredients, which has great potential in pharmaceutical development. In this study, the cocrystal of nitrofurantoin and 4-aminobenzoic acid was prepared with solid-state (solvent-free or green-chemistry) grinding approach, and the above cocrystal has been characterized by Raman and terahertz vibrational spectroscopic techniques. Spectral results show that the vibrational modes of the cocrystal within the whole spectral region are different from those of the corresponding parent materials. The dynamic process of such pharmaceutical cocrystal formation has also been monitored directly with Raman spectra. These results offer us unique means for characterizing the cocrystal conformation from molecule-level and also provide us rich information about the reaction dynamic of cocrystal formation within pharmaceutical fields.

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