scholarly journals Dithienopyrrole-based monomers as an acceptor unit building for synthesis of donor – acceptor conjugated polymers

2016 ◽  
Vol 19 (3) ◽  
pp. 99-107
Author(s):  
Tam Huu Nguyen ◽  
Thu Anh Nguyen ◽  
Viet Quoc Nguyen ◽  
Trung Thanh Nguyen ◽  
Ha Tran Nguyen
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Conjugated Polymers ◽  
Fourier Transform Infrared ◽  
Polycondensation Reaction ◽  
Suzuki Polycondensation ◽  
Donor Acceptor ◽  
Ft Ir ◽  
Nuclear Magnetic

A new monomer of N-benzoyl dithieno[2,3-b:2’,3’-d]pyrrole (BDP), has been successfully prepared via copper-catalyzed amidation. Then, this monomer was brominated to form 2,6-dibromo-n-benzoyl dithieno[2,3-b:2’,3’-d]pyrrole (DiBDP) monomer. The structures of monomers were confirmed via the nuclear magnetic resonance (1HNMR) and Fourier transform infrared (FT-IR). BDP and DiBDP monomers will be used as monomers for Suzuki polycondensation reaction to synthesize the donor-acceptor (D-A) conjugated polymers.

scholarly journals Synthesis of n-(4-hexylbenzoyl) dithieno[3,2-b:2’,3’-d]pyrrole as a new building block toward application in donor – acceptor conjugated polymers

2019 ◽  
Vol 15 (3) ◽  
pp. 58
Author(s):  
Phan Tan Ngoc Tan ◽  
Nguyen Huu Tam ◽  
Nguyen Tran Ha
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Conjugated Polymers ◽  
13C Nmr ◽  
Main Product ◽  
Donor Acceptor ◽  
Ft Ir ◽  
Type C ◽  
Direct Arylation Polycondensation

A new derivative of bridged bithiophene based N-(4-hexylbenzoyl) dithieno[3,2-b:2’,3’-d]pyrrole (HBDP) has been successfully synthesized from 3,3’-dibromo-2,2’-bithiophene and 4-hexylbenzamide via Ullmann-type C-N coupling amidation using 20 mol% CuI and 40 mol% DMEDA in 24 hours. A conversion of the HBDP monomer has obtained around of 35%. The structure of main product HBDP was characterized via the nuclear magnetic resonance (1H NMR and 13C NMR) and fourier transform infrared (FT-IR). The HBDP monomers will be used as potential moieties for direct arylation polycondensation to synthesize the donor-acceptor conjugated polymers.

Residual Hydrogen Determination in Perfluoropolyalkylethers Using Fourier Transform Infrared and Proton Nuclear Magnetic Resonance Spectroscopies

1995 ◽  
Vol 49 (10) ◽  
pp. 1474-1477 ◽  
Author(s):  
Jim Liang ◽  
Mark Roselius ◽  
David W. Johnson
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Fourier Transform Infrared ◽  
Proton Nuclear Magnetic Resonance ◽  
Linear Calibration ◽  
Standard Samples ◽  
Residual Hydrogen ◽  
Ft Ir ◽  
Nuclear Magnetic

The residual hydrogen content of several perfluoropolyalkylether base fluids has been determined with the use of proton nuclear magnetic resonance (NMR) and Fourier transform infrared (FT-IR) spectroscopies. The analysis of standard samples gives a linear calibration curve for hydrogen concentrations between 0.5 and 500 ppm for both FT-IR and NMR. The two methods have similar detection limits of about 1 ppm. Analysis of identical samples of Krytox 143 AC and Krytox 143 AZ by both methods gives results which are in excellent agreement. The two methods also provide information about the chemical environment in which the hydrogen is located. In both of the Krytox samples, the hydrogen is located in CFH groups within the polymer chain.

scholarly journals A Nuclear Magnetic Resonance and Fourier-Transform Infrared Spectroscopic Study of Lyophilized Umbilical Cord Blood Platelet Rich Plasma

2021 ◽  
Vol 11 (3) ◽  
pp. 3854-3860
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Cord Blood ◽  
Umbilical Cord ◽  
Umbilical Cord Blood ◽  
Platelet Rich Plasma ◽  
Fourier Transform Infrared ◽  
Blood Platelet ◽  
Nuclear Magnetic

Cord blood platelet-rich plasma is regarded as a potential therapeutic agent with wound healing and regenerative purposes. It has many advantages, such as availability, universal use, and being rich in regenerative tissue factors. To characterize the Umbilical Cord Blood Platelet Rich Plasma (UCB-PRP), umbilical cord blood is collected from healthy mothers in sterile vacutainers. Platelet-rich plasma was extracted after two sets of centrifugations and lyophilized using the freeze-drying method. The samples are subjected to physicochemical characterization using Nuclear Magnetic Resonance (NMR) and Fourier-Transform Infrared (FTIR) Spectroscopy. This translational approach provided evidence of clinical effectiveness for understanding physiology and pathophysiology at the molecular level. Accordingly, FTIR and NMR studies provided information on the structural stability of protein molecules present in UCB-PRP.

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