Photocrosslinked hydrogels are being investigated for many tissue engineering applications because of the ability to form these materials in-situ in a minimally invasive manner by injection of aqueous solution under physiological conditions. In this work, carboxymethyl chitin (CMCH) synthesized ...
A series of poly (imidazoled glycidyl methacrylate-co-diethylene glycol methyl ether methacrylate) copolymers (denoted as P (iGMA-co-MEO2MA)) with different monomer compositions were synthesized and characterized. These copolymers exhibit lower critical solution temperature (LCST) behaviors as t...
Tris(trimethylsilyl) borate (TMSB) has been taken as solid electrolyte interface forming additive in carbonated liquid electrolyte of current lithium ion battery, but it has not been applied in Gel Polymer Electrolyte (GPE) yet. In this investigation, TMSB is selected to enhance the cyclic perfo...
Poly(2-trimethylsilyl-2-propyl methacrylate) was synthesized and evaluated as a potential dry-developable chemically amplified photoresist. The deprotection of 2-trimethylsilyl-2-propyl group of the polymer takes place in the exposed region after post-exposure bake. The difference of silicon con...
Bis- and tetra(trimethylsilyl) substituted lanthanocene methyl complexes, [(Me3SiC5H4)2SmMe]2 (2) {[1,3-(Me3Si)2C5H3]2SmMe}2 (4) and {[1,3-(Me3Si)2C5H3]2NdMe}2 (5) were prepared in high yield from trimethylsilyl- or bis(trimethylsilyl)cyclopentadienyllithium and LnCl3(THF)2 followed by the react...
Deprotection of poly(2-trimethylsilyl-2-propyl methacrylate) was studied for various photogenerated acids. Deprotection of 2-trimethylsilyl-2-propyl (TMSP) ester did not occur in a catalytic manner when the photogenerated acid possessing a fluoride ion source such as SbF6− or AsF6− was used. Bec...
The lasing properties of pyrromethene 567 (PM567) dissolved in solid poly-trimethylsilyl-methacrylate (TMSMA) cross-linked with ethylene glycol dimethacrylate (EGDMA) and copolymerized with methyl methacrylate (MMA) have been investigated. The vol/vol proportion of the different comonomers in ea...
Poly(2-trimethylsilyl-2-propyl methacrylate-co-γ-butyrolactone-2-yl methacrylate) was synthesized and evaluated as a chemically amplified resist for ArF lithography. The polymer has excellent transmittance at 248 nm and also has a good transmittance at 193 nm. In addition, the polymer possesses...
Statistical copolymers of styrene with trimethylsilyl methacrylate, STMS, and trimethylsilyloxyethyl methacrylate, STME, and of 2-vinylpyridine with trimethylsilyloxyethyl methacrylate, VTME were prepared by free radical copolymerization in benzene with 2,2′-azobisisobutyronitrile, AIBN. The re...
We synthesized a series of novel 3-indolyl cyclopent[b]indoles by trifluoroacetic acid mediated cyclodimerizations. The reaction showed high stereoselectivity and moderate to good yields. The influencing factors for stereoselectivity were systematically analyzed and a stepwise reaction mechanism...
Fluorescent dyes are a significant research tool with various applications in modern science. However, many experiments require the preparation of covalent dye conjugates, which is impossible without the presence of a functional group on the dye molecule. Unfortunately, the introduction of such ...
A mild propargylic oxidation of alkynes is reported using a diacetoxyiodobenzene/tert-butyl hydroperoxide (DIB/TBHP) protocol. The reactions proceed smoothly at 0 °C and a number of α,β-unsaturated alkynoic ketones are obtained.
Primary tert-alkyl amines include analogues of amantadine, a fragment commonly linked to pharmacophoric groups to enhance biological activity. The preparation of primary tert-alkyl amines is considered to be a difficult problem. Four synthetic procedures, some of which have been previously repor...
The ruthenium assisted azide-alkyne cycloaddition (RuAAC) reaction is a well-established method for the generation of 1,5- and 1,4,5-substituted 1,2,3-triazoles, which we have extended to the solid-phase synthesis of 1,2,3-triazole-peptides. The 1,2,3-triazole moieties were formed upon the react...
The current manuscript describes the catalysts in click chemistry reactions, mechanism insights and use of other metals beyond copper associated with Azide-Alkyne Cycloadditions (AAC). Due to their biological importance and several applications in various areas of science, significant efforts ha...
A general method, for the direct conversion of aldehydes to acyl azides using tert-butyl hypochlorite and sodium azide is described. The method is simple and occurs under mild conditions.
In the presence of tert-butyl iodide, alkyl azides are converted into the corresponding iodides at room temperature, whereas, N-t-Bu anilines are obtained from aryl azides under the same experimental conditions. A mechanism is proposed to explain this unusual reactivity.
The synthesis of a series of 2-(1,1-difluoroalkyl) thiophenes, including some biphenylthienyl liquid crystalline materials, was examined using a variety of fluorination approaches. For comparison purposes, a series of 1,1-difluoroalkyl benzene analogs were also prepared. The direct fluorodeoxyge...
By proton-catalyzed transacetalation with 2-bromoacetaldehyde dimethyl acetal as the substrate and 2,3,4,6-tetra-O-acetyl-d-glucose as the acceptor, a mixture of diastereoisomeric, mixed-acetal glycosides was obtained. α-Glycosides preponderated, and could be separated by chromatography into (R...
The effect of 4 adjuvants on two formulations of phenmedipham (EC and SC) applied with three types of hydraulic nozzles (hollow cone, flat fan and air induction) was evaluated using a wind tunnel to determine spray drift potential (DP). The volume median diameter (VMD) and the percentage by volu...
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