Synthesis and molecular weight and structural determinations of (polyvinylpyrrolidone)‐ oximate‐silico‐benzoyl glycine copolymer with IR and NMR spectroscopy

Abstract

A novel linear edge filter based on a piece of tunable twin‐core fiber is proposed in this article.The transmission spectrum of the twin‐core fiber can be adjusted by pulling and twisting the twin‐core fiber to match the central wavelength of the Fiber Bragg Grating (FBG) used for the temperature sensor. The feasibility of the method is analyzed and demonstrated experimentally. This demodulation filter, which is based on the all‐fiber component, can be designed and adjusted according to the measurement sensitivity and range of FBG temperature sensor, so its characteristics of compact scheme and low cost would make this method more applicable. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:81–84, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25681

Preparation, structural elucidation, molecular weight determination, and molecular recognition of first‐ and second‐tier dendrimer molecules

“…A negative contribution to V of SG is due to stronger interactions between Na + and strongly polarized hydrogen of the solvent 19–21. The positive contribution to V of TCTA, G 1 , G 2 , and TATC is due to hydrophilic–hydrophilic interactions, as reported by Singh et al22 The G 2 > SG > G 1 > TCTA > TATC order of the S v values falls in the range of −2.83 × 10 2 to 1.14 × 10 4 /10 −6 kg m 3 /mol 2 , with larger expansion in the size of the confirmatory state 23. This fascinated us because the V values imply cage formation of a larger size around the dendrimer molecules, although it is contradictory vis‐à‐vis the ρ 0 values.…”

Improved hydrogen evolution performance by engineering bimetallic AuPd loaded on amino and nitrogen functionalized mesoporous hollow carbon spheres

“…In addition, the band at 1401 cm −1 can be assigned either to carboxyl–carbonate structure or aromatic C–C bonds whereas the band at 1262 cm −1 can be attributed to C–O–C vibrations in ether groups on the surface of HMCS-O. With APTMS treatment, several new absorption bands at 1203, 1111, 916 and 689 cm −1 were observed in the spectrum of Au 0.3 Pd 0.7 /NH 2 –N-HMCS, related to N–H groups, 27 Si–O–C stretching vibration, 28 C–H bending vibration and C–N stretching vibration, 29,30 confirming the existence of –NH 2 groups and N doping in the NH 2 –N-HMCS. Interestingly, compared with HMCS-O, the band at 1719 cm −1 is barely visible for Au 0.3 Pd 0.7 /NH 2 –N-HMCS.…”