4 Dimethylaminoazobenzene - Explore the Science & Experts | ideXlab

Scan Science and Technology

Contact Leading Edge Experts & Companies

4 Dimethylaminoazobenzene

The Experts below are selected from a list of 69 Experts worldwide ranked by ideXlab platform

4 Dimethylaminoazobenzene – Free Register to Access Experts & Abstracts

Zhen-long Zhang – One of the best experts on this subject based on the ideXlab platform.

  • Surface-enhanced Raman scattering of 4Dimethylaminoazobenzene on copper surface
    Proceedings of 2011 International Conference on Electronics and Optoelectronics, 2011
    Co-Authors: Zhen-long Zhang, Baoquan Men
    Abstract:

    In this paper, surface-enhanced Raman spectrum of 4Dimethylaminoazobenzene adsorbed on the copper surface was investigated. The normal Raman and surface-enhanced Raman peaks were assigned according to some reports. Based on the spectra analysis, the adsorption of DAB molecule on copper surface is proposed.

  • Single molecule detection of 4Dimethylaminoazobenzene by surface-enhanced Raman spectroscopy
    Journal of Molecular Structure, 2008
    Co-Authors: Zhen-long Zhang, Y.f. Yin, J.w. Jiang
    Abstract:

    Abstract 4Dimethylaminoazobenzene (DAB) is anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity in experimental animals. The trace detection of DAB is of great significance in environmental protection and safe life of the people. To test the availability of DAB trace detection using surface-enhanced Raman scattering (SERS), the SERS spectra of DAB single molecules adsorbed on the silver particle aggregates in colloid were investigated. The phenomena of blinking, spectral diffusion, and intensity fluctuations of the vibrational lines in the SERS spectra were observed. Statistical analysis of spectral intensity fluctuations indicates a multimodal distribution of some specific Raman bands, which are consistent with the identification of single molecule detection. Our results demonstrated that SERS can be applied to the trace detection of DAB molecules and other azo dyes.

Koki Kunimoto – One of the best experts on this subject based on the ideXlab platform.

  • crystal structure of 4 Dimethylaminoazobenzene 4 sulfonyl l tryptophan dimethylsulfoxide solvate
    Analytical Sciences: X-ray Structure Analysis Online, 2004
    Co-Authors: Chizuru Sasaki, Sohichi Kitoh, Hiroshige Hayashi, Koki Kunimoto
    Abstract:

    Crystals of 4Dimethylaminoazobenzene4′-sulfonyl-L-tryptophan dimethylsulfoxide solvate (Dabs-Trp·DMSO) are monoclinic, space group P21 with a = 12.941(6)A, b = 7.760(3)A, c = 14.131(7)A, β = 103.161(8)° and Z = 2. The structure was solved by direct methods (SIR88) and refined to a final R value of 0.058 for 3152 reflections (I > 2.00σ(I)). The molecular geometries and conformations are comparable to the typical values of azobenzene and L-tryptophan. The DMSO molecule is involved in the intermolecular hydrogen bonds with the sulfonamide NH and the carboxyl OH groups of different Dabs-Trp molecules. The hydrogen-bonded chains propagate along the b axis, and are constructed from molecules related by a two-fold screw axis. The sulfonamide S=O and the carboxyl C=O groups do not participate in hydrogen bonding.

  • crystal structure of 2 trifluoromethyl 4 Dimethylaminoazobenzene
    Analytical Sciences: X-ray Structure Analysis Online, 2003
    Co-Authors: Chizuru Sasaki, Sohichi Kitoh, Kazuya Yamada, Koki Kunimoto, Shiro Maeda, Akio Kuwae, Kazuhiko Hanai
    Abstract:

    Crystals of 2-trifluoromethyl-4′-Dimethylaminoazobenzene (2-TFMDAB) are orthorhombic, space group Pbca with a =15.625(4), b = 23.028(6), c = 7.685(2)A, and Z = 8. The structure was solved by direct methods (SIR88) and refined to a final R value of 0.049 for 2536 reflections (I>0.80σ(I)). 2-TFMDAB has a trans geometry about the azo linkage. The bond lengths and angles are similar to those of other azobenzene compounds. The abnormal UV-vis absorption spectrum in an acidic solution can be explained by the existence of the bulky and electronegative CF3 group at the 2-position, which prevents protonation at the Nβ atom of the azo group in an acidic solution.

Kunimoto Koki – One of the best experts on this subject based on the ideXlab platform.

  • Crystal Structure of 4Dimethylaminoazobenzene4′-sulfonyl-L-tryptophan Dimethylsulfoxide Solvate
    日本分析化学会 = The Japan Society for Analytical Chemistry, 2004
    Co-Authors: Sasaki Chizuru, Kitoh Soh-ichi, Hayashi Hiroshige, Kunimoto Koki
    Abstract:

    Crystals of 4Dimethylaminoazobenzene4′-sulfonyl-L-tryptophan dimethylsulfoxide solvate (Dabs-Trp·DMSO) are monoclinic, space group P21 with a = 12.941(6)Å, b = 7.760(3)Å, c = 14.131(7)Å, β = 103.161(8)° and Z = 2. The structure was solved by direct methods (SIR88) and refined to a final R value of 0.058 for 3152 reflections (I > 2.00σ(I)). The molecular geometries and conformations are comparable to the typical values of azobenzene and L-tryptophan. The DMSO molecule is involved in the intermolecular hydrogen bonds with the sulfonamide NH and the carboxyl OH groups of different Dabs-Trp molecules. The hydrogen-bonded chains propagate along the b axis, and are constructed from molecules related by a two-fold screw axis. The sulfonamide S=O and the carboxyl C=O groups do not participate in hydrogen bonding

  • Crystal Structure of 2-Trifluoromethyl-4′-Dimethylaminoazobenzene
    日本分析化学会 = The Japan Society for Analytical Chemistry, 2003
    Co-Authors: Sasaki Chizuru, Kitoh Sohichi, Yamada Kazuya, Kunimoto Koki, Maeda Shiro, Kuwae Akio, Hanai Kazuhiko
    Abstract:

    Crystals of 2-trifluoromethyl-4′-Dimethylaminoazobenzene (2-TFMDAB) are orthorhombic, space group Pbca with a =15.625(4), b = 23.028(6), c = 7.685(2)Å, and Z = 8. The structure was solved by direct methods (SIR88) and refined to a final R value of 0.049 for 2536 reflections (I>0.80σ(I)). 2-TFMDAB has a trans geometry about the azo linkage. The bond lengths and angles are similar to those of other azobenzene compounds. The abnormal UV-vis absorption spectrum in an acidic solution can be explained by the existence of the bulky and electronegative CF3 group at the 2-position, which prevents protonation at the Nβ atom of the azo group in an acidic solution

Shunzo Yamamoto – One of the best experts on this subject based on the ideXlab platform.

J.w. Jiang – One of the best experts on this subject based on the ideXlab platform.

  • Single molecule detection of 4Dimethylaminoazobenzene by surface-enhanced Raman spectroscopy
    Journal of Molecular Structure, 2008
    Co-Authors: Zhen-long Zhang, Y.f. Yin, J.w. Jiang
    Abstract:

    Abstract 4Dimethylaminoazobenzene (DAB) is anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity in experimental animals. The trace detection of DAB is of great significance in environmental protection and safe life of the people. To test the availability of DAB trace detection using surface-enhanced Raman scattering (SERS), the SERS spectra of DAB single molecules adsorbed on the silver particle aggregates in colloid were investigated. The phenomena of blinking, spectral diffusion, and intensity fluctuations of the vibrational lines in the SERS spectra were observed. Statistical analysis of spectral intensity fluctuations indicates a multimodal distribution of some specific Raman bands, which are consistent with the identification of single molecule detection. Our results demonstrated that SERS can be applied to the trace detection of DAB molecules and other azo dyes.