scholarly journals Tổng hợp polymer quang dẫn poly(4-diphenylamino styrene) cho vật liệu quang phi tuyến

2019 ◽  
Vol 14 (3) ◽  
pp. 18
Author(s):  
Nguyễn Hữu Vinh ◽  
Nguyễn Thế Mạnh ◽  
Nguyễn Thị Thúy Hồng ◽  
Bạch Long Giang ◽  
Giang Ngọc Hà
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
1H Nmr Spectroscopy ◽  
Chemical Structure ◽  
Proton Nuclear Magnetic Resonance ◽  
White Crystal ◽  
Synthesis Procedure ◽  
The University ◽  
Wittig Reagent ◽  
University Laboratory

The typical synthesis procedure for the monomer of N,N-diphenyl-4-vinylaniline was conducted and has been proved to be ineffective in the university laboratory conditions. The modified procedure was applied successfully using freshly formed Wittig reagent. The monomer was characterized by proton nuclear magnetic resonance (1H NMR) spectroscopy and confirmed the chemical structure with the correct peaks. The photoconductive polymer of poly((4-diphenylamino styrene)) could be obtained only by using the white crystal monomer.

Use of high-resolution proton nuclear magnetic resonance spectroscopy for rapid multi-component analysis of urine.

1984 ◽  
Vol 30 (3) ◽  
pp. 426-432 ◽  
Author(s):  
J R Bales ◽  
D P Higham ◽  
I Howe ◽  
J K Nicholson ◽  
P J Sadler
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
High Resolution ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Proton Nuclear Magnetic Resonance ◽  
Resonance Spectroscopy ◽  
Simple Method ◽  
Nuclear Magnetic

Abstract Numerous low-Mr metabolites--including creatinine, citrate, hippurate, glucose, ketone bodies, and various amino acids--have been identified in 400- and 500-MHz proton nuclear magnetic resonance (1H NMR) spectra of intact human urine. The presence of many of these was related to the specific condition of the donors: humans in different physiological states (resting, fasting, or post-exercise) and pathological conditions (e.g., diabetes mellitus, cadmium-induced renal dysfunction). We have also monitored the metabolism of simple nonendogenous compounds (methanol and ethanol) and of acetaminophen. The pH-dependencies of the NMR chemical shifts of some urine components are reported. Our studies show that high-resolution 1H NMR spectroscopy provides a fast, simple method for "fingerprint" identification of urinary compounds. In some cases, analytes can be quantified by standard additions or by comparing integrated peak areas for the metabolites with those for creatinine. Determinations of creatinine by 1H NMR spectroscopy compared well with those by an independent chemical assay based on the Jaffé reaction.

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