Citation: Ali Niazi, Ateesa Yazdanipour, Majid Ramezani. Multiwavelength spectrophotometric determination of acidity constants of 1-(2-thiazolylazo)-2-naphthol in methanol-water mixtures[J]. Chinese Chemical Letters, ;2007, 18(8): 989-992. doi: 10.1016/j.cclet.2007.06.010 shu

Multiwavelength spectrophotometric determination of acidity constants of 1-(2-thiazolylazo)-2-naphthol in methanol-water mixtures

Department of Chemistry, Faculty of Sciences, Azad University of Arak, Arak, Iran

Received Date: 12 March 2007

The acid-base properties of 1-(2-thiazolylazo)-2-naphthol (TAN) in mixtures of methanol-water at 25℃ and an ionic strength of 0.1 mol/L are studied by a multi-wavelength spectrophotometric method. The acidity constants of all related equilibria are estimated using the whole spectral fitting of the collected data to an established factor analysis model. DATAN program was used for determination of acidity constants. The corresponding pK_a values in methanol-water mixtures were determined. There is a linear relationship between acidity constants and the mole fraction of methanol in the solvent mixtures.
- TAN,
- Acidity constants,
- Methanol,
- Spectrophotometry,
- DATAN
1. [1]
  Ming Huang , Xiuju Cai , Yan Liu , Zhuofeng Ke . Base-controlled NHC-Ru-catalyzed transfer hydrogenation and α-methylation/transfer hydrogenation of ketones using methanol. Chinese Chemical Letters, 2024, 35(7): 109323-. doi: 10.1016/j.cclet.2023.109323
2. [2]
  Feifei Yang , Wei Zhou , Chaoran Yang , Tianyu Zhang , Yanqiang Huang . Enhanced Methanol Selectivity in CO₂ Hydrogenation by Decoration of K on MoS₂ Catalyst. Acta Physico-Chimica Sinica, 2024, 40(7): 2308017-0. doi: 10.3866/PKU.WHXB202308017
3. [3]
  Dongqi Cai , Fuping Tian , Zerui Zhao , Yanjuan Zhang , Yue Dai , Feifei Huang , Yu Wang . Exploration of Factors Influencing the Determination of Ion Migration Number by Hittorf Method. University Chemistry, 2024, 39(4): 94-99. doi: 10.3866/PKU.DXHX202310031
4. [4]
  Zhongbin Pan , Shijie Huang , Yunjie Luo , Hongzhen Xie . Design of a Comprehensive Experiment for Determining Permanganate Index (COD_Mn) in Drinking Water. University Chemistry, 2024, 39(7): 354-360. doi: 10.12461/PKU.DXHX202311040
5. [5]
  Kuaibing Wang , Honglin Zhang , Wenjie Lu , Weihua Zhang . Experimental Design and Practice for Recycling and Nickel Content Detection from Waste Nickel-Metal Hydride Batteries. University Chemistry, 2024, 39(11): 335-341. doi: 10.12461/PKU.DXHX202403084
6. [6]
  Chunru Liu , Ligang Feng . Advances in anode catalysts of methanol-assisted water-splitting reactions for hydrogen generation. Chinese Journal of Structural Chemistry, 2023, 42(10): 100136-100136. doi: 10.1016/j.cjsc.2023.100136
7. [7]
  Xinyi Hu , Riguang Zhang , Zhao Jiang . Depositing the PtNi nanoparticles on niobium oxide to enhance the activity and CO-tolerance for alkaline methanol electrooxidation. Chinese Journal of Structural Chemistry, 2023, 42(11): 100157-100157. doi: 10.1016/j.cjsc.2023.100157
8. [8]
  Xinyu You , Xin Zhang , Shican Jiang , Yiru Ye , Lin Gu , Hexun Zhou , Pandong Ma , Jamal Ftouni , Abhishek Dutta Chowdhury . Efficacy of Ca/ZSM-5 zeolites derived from precipitated calcium carbonate in the methanol-to-olefin process. Chinese Journal of Structural Chemistry, 2024, 43(4): 100265-100265. doi: 10.1016/j.cjsc.2024.100265
9. [9]
  Jie Ma , Jianxiang Wang , Jianhua Yuan , Xiao Liu , Yun Yang , Fei Yu . The regulating strategy of hierarchical structure and acidity in zeolites and application of gas adsorption: A review. Chinese Chemical Letters, 2024, 35(11): 109693-. doi: 10.1016/j.cclet.2024.109693
10. [10]
  Jinqiang Gao , Haifeng Yuan , Xinjuan Du , Feng Dong , Yu Zhou , Shengnan Na , Yanpeng Chen , Mingyu Hu , Mei Hong , Shihe Yang . Methanol steam mediated corrosion engineering towards high-entropy NiFe layered double hydroxide for ultra-stable oxygen evolution. Chinese Chemical Letters, 2025, 36(1): 110232-. doi: 10.1016/j.cclet.2024.110232
11. [11]
  Kaili Wang , Pengcheng Liu , Mingzhe Wang , Tianran Wei , Jitao Lu , Xingling Zhao , Zaiyong Jiang , Zhimin Yuan , Xijun Liu , Jia He . Modulating d-d orbitals coupling in PtPdCu medium-entropy alloy aerogels to boost pH-general methanol electrooxidation performance. Chinese Chemical Letters, 2025, 36(4): 110532-. doi: 10.1016/j.cclet.2024.110532
12. [12]
  Fenglin Wang , Chengwei Kuang , Zhicheng Zheng , Dan Wu , Hao Wan , Gen Chen , Ning Zhang , Xiaohe Liu , Renzhi Ma . Noble metal clusters substitution in porous Ni substrate renders high mass-specific activities toward oxygen evolution reaction and methanol oxidation reaction. Chinese Chemical Letters, 2025, 36(6): 109989-. doi: 10.1016/j.cclet.2024.109989
13. [13]
  Han-Bin Liu , Xiaoyu Cheng , Zhou Guo , Juan Yang , Fuwen Tan , Donghui Lan , Jian-Ping Tan , Bing Yi , Weixin Zhai , Qing-Hui Guo . CrownBind-IA: A machine learning model predicting binding constants between crown ethers and alkali metal ions. Chinese Chemical Letters, 2025, 36(12): 111149-. doi: 10.1016/j.cclet.2025.111149

Get Citation

PDF

XML

Metrics

PDF Downloads(1)
Abstract views(1162)
HTML views(37)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return