A5018518748- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Graphene research and applications
- DNA and Nucleic Acid Chemistry
- Metal-Organic Frameworks: Synthesis and Applications
- Crystallography and molecular interactions
- HIV/AIDS drug development and treatment
- RNA and protein synthesis mechanisms
- Magnetism in coordination complexes
- Membrane Separation Technologies
- Luminescence and Fluorescent Materials
- Carbohydrate Chemistry and Synthesis
- Membrane Separation and Gas Transport
- Nanopore and Nanochannel Transport Studies
- MXene and MAX Phase Materials
- Near-Field Optical Microscopy
- 2D Materials and Applications
- Solar-Powered Water Purification Methods
- Covalent Organic Framework Applications
- Carbon and Quantum Dots Applications
- Enzyme Structure and Function
- Synthesis of heterocyclic compounds
- Polyoxometalates: Synthesis and Applications
- Protein Structure and Dynamics
- Chemical Synthesis and Reactions
University of Manchester
2021-2023
Henry Royce Institute
2021-2023
Jawaharlal Nehru Centre for Advanced Scientific Research
2013-2016
Sukkur IBA University
2016
Bangalore University
2015
MS Technology (United States)
2012
King's College Hospital
1979
University of London
1977-1979
King's College London
1976-1978
Drury University
1978
Layered silicates provide an interesting avenue to novel materials. There has been a growing interest in recent years for the development of functional materials using tailor made clays. This review highlights one such made, water dispersible aminopropyl functionalized magnesium phyllosilicate (aminoclay) type R8Si8Mg6O16(OH)4, (where R = –CH2CH2NH2) and its multiple applications catalysis, biology, fuel cells light-harvesting hybrids.
MoS<sub>2</sub> membranes show high performance H<sub>2</sub>/CO<sub>2</sub> separation at H<sub>2</sub> permeability. The were found to be thermally stable up 160 °C and a significant increase in gas permeability was observed due the driven phase transition from 1T 2H phase.
A novel composite with ultra-small (2–3 nm) MOF nanoparticles stabilized on an aminoclay template shows high CO<sub>2</sub>capture, separation and chemical fixation efficacy.
Van der Waals (vdW) heterostructures continue to attract intense interest as a route of designing materials with novel properties that cannot be found in naturally occurring materials. Unfortunately, this approach is currently limited only few layers can stacked on top each other. Here we report bulk material consisting superconducting monolayers interlayered displaying charge density waves (CDW). This vdW heterostructure created by phase transition 1T-TaS2 6R at 800 {\deg}C an inert...
The aqueous dispersion of graphene or reduced oxide (RGO) is very much important to realize the full potential these materials in many fields. Herein we present a simple route prepare highly water dispersible aminoclay–RGO (AC–RGO) hybrids by situ condensation aminoclay over (GO) followed reduction with hydrazine hydrate. resultant are stable media even at concentrations up 7.5 mg RGO per mL. To best our knowledge this highest concentration an RGO. Significantly, amphiphilic nature and show...
Abstract The high‐resolution crystal and molecular structure of a 3:2 complex proflavine cytidylyl‐(3′,5′)‐guanosine is described. exhibits more than one mode dye binding to the dinucleoside phosphate. One cation symmetrically intercalated between base pairs. other cations ones related by symmetry stack above below pairs also hydrogen bond externally duplex. conformation CpG most similar A‐RNA with all C(3′)‐ endo sugar puckering. To allow stretch from normal 3.4‐Å separation 6.8‐Å...
Adenosine-Y-phosphate monohydrate was crystallized in the orthorhombic space group P212121, with a=22997 (2), b=9.406 (1), c=6.599 (1)A,, Z=4. The structure solved by direct methods and refined to a final Rw of 0.0639 for 1320 significant reflexions measured on an automatic diffractometer. The conformation molecule differs significantly from that previously reported monoclinic monohydrate [Kraut & Jensen, Acta Cryst. (1963), 16, 79-88]. sugar conformation, example, is here C(2)'-endo,...
Graphene oxide (GO) membranes are known to have a complex morphology that depends on the degree of oxidation graphene flake and membrane preparation technique. In this study, using Grand Canonical Monte Carlo simulations, we investigate mechanism swelling GO exposed different relative humidity (RH) values show how is intimately related surface chemistry. We structure changes while adsorbs water from environment flakes become charged as loaded with swells. A detailed comparison between...
Clay–chromophore hybrids have been employed to critically affect the kinetic landscape of ring closure photo-oxidation reaction.
The fabrication and characterization of a novel metamaterial that shows negative index in the visible (blue) is reported. real part this at 405 nm, comprising co-sputtered SiC + Ag nanoparticle mixture on glass substrate, deduced from results double Michelson interferometry setup which phase delay. It numerically verified can yield near-field super-resolution imaging for both TE TM polarizations.
Annealed graphene oxide membranes show a severalfold increase in gas permeability without compromising the selectivity. This enhancement can be attributed to formation of channels due creation oxygen-rich and oxygen-deficient domains on surface.
In this study, soft clay chromophore hybrids were used to demonstrate a photo-modification strategy, in which one white light standard can be converted into another <italic>via situ</italic> generation of blue emitting chromophore.
The structure of cytosine monohydrate has been redetermined with reflexion data obtained from automatic digital scanning Weissenberg films. previous determination diffractometer data [McClure & Craven, Acta Cryst. (1973), B29, 1234--1238] converged to an R 0.037, with average estimated standard deviations 0002 A and 015 ° in derived bond lengths angles. The photographic set 0-0672 e.s.d.'s 0-004--0-005 0.3-0.4 °. Normal probability plots showed that the positional (and geometric)...
C13HIIN3.H20 , orthorhombic, Cmc21, a= 14.493 (8), b= 14.675 c= 5.772 (5) A, Din= 1.29 (1), De= 1.298 g cm -3 for Z=4. Equi-inclination Weissenberg intensities, scanned with an automatic densitometer. The structure, solved by direct methods, was refined to R 0.0928 and Rw 0.0910 418 reflexions. The ring system is slightly non-planar, the crystal structure characterized a lack of interplanar stacking.
A family of heterometallic rings [Me4N]2[CrIII6MII2F8(O2CtBu)16] is reported using tetramethylammonium hydroxide pentahydrate as the source a template, where M = Zn, Mn, Ni, and Co. The metal cores are octagons with metal-metal edges bridged by one fluoride two carboxylate ligands. divalent ions found ordered at positions 1 5 in octagon. cations above below plane ring crystal structure. Magnetic studies show antiferromagnetic coupling between paramagnetic present, leading to ground states...
The structure of a 6-O-mesitylenesulphonyl derivative 2',3',5'-tri-O-acetylguanosine, C 24 H 29 N50 10 S, has been determined by X-ray diffraction.Crystals are monoclinic, = 26.370(4), b 8.200 (2), c 17.991 (3) A, fl 132.77(4) o.The solution the in space group C2 was not straightforward and is described detail.Refinement converged at R 0.110 for 1102 observed reflections.The guanine base displays some deviations from its usual geometry due to loss C(6)-O(6) double-bond character.The ribose...
As an official activity of the Co~~ission on Crystallographic Studies at Controlled Pressures and Tempera-•tures, extension t.1-:J.estudy transformations specific pressures to higher pressure region was undertaken.The taraet focused semiconductor-conductor transfo~ation in Ga~s which occurs 180-193 kbar according previous investigation& This is a direct ~~tension former report transformation ZnS by Block Warsaw meeting(l978).A high-purity 1 non-doped crystal o£ GaAs distributed more than ten...
We report the synthesis and structural characterization of a series heterometallic rings templated via alkylammonium or imidazolium cations. The template preference each metal's coordination geometry can control structure compounds, leading to octa-, nona-, deca-, dodeca-, tetradeca-metallic rings. compounds were characterized by single-crystal X-ray diffraction, elemental analysis, magnetometry, EPR measurements. Magnetic measurements show that exchange coupling between metal centres is...