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Izadmanesh Y, Ghasemi JB. Thermodynamic study of β-cyclodextrin-dye inclusion complexes using gradient flow injection technique and molecular modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 165:54-60. [PMID: 27111153 DOI: 10.1016/j.saa.2016.04.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 03/07/2016] [Accepted: 04/13/2016] [Indexed: 06/05/2023]
Abstract
Gradient flow injection technique-diode array spectrophotometry was applied for β-cyclodextrin (β-CD)-dye inclusion complex studies. A single injection of a small amount of mixed β-CD-dye solution (100μl) into the carrier solution of the dye and recording the spectra gave the titration data. The mole ratio data were calculated by calibrating the dispersion pattern using a calibrator dye (rose bengal). Model-based multivariate methods were used to analyze the spectral-mole ratio data and, as a result, estimate stability constants and concentration-spectral profiles. Reliability was tested by applying this method to study the β-CD host-guest complexes with several dyes as guest molecules. Singular value decomposition (SVD) was used to select the chemical model and reduce noise. Molecular modeling provided the ability to predict the guest conformation-orientation (posing) within the cavity of β-CD and the nature of the involved interactions. Among those dyes showing observable spectral variation, the stoichiometric ratio of β-CD: dye (and log Kf) of methyl orange, fluorescein, phenol red, 4-(2-pyridylazo) resorcinol (PAR), and crystal violet were calculated to be 1:1 (4.26±0.01), 1:1 (1.53±0.08), 1:1 (3.11±0.04), 1:1 (1.06±0.12), and 2:1 (5.27±0.03), respectively. Compared with the classical method of titration, this method is simple and fast and has the advantage of needing reduced human interference. Molecular modeling facilitates a better understanding of the type of interactions and conformation of guest molecules in the β-CD cavity. The details of the proposed method are discussed in this paper.
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Affiliation(s)
- Y Izadmanesh
- Faculty of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
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Stock RI, de Melo CEA, Schramm ADS, Nicoleti CR, Bortoluzzi AJ, Heying RDS, Machado VG, Rezende MC. Structure–behavior study of a family of “hybrid cyanine” dyes which exhibit inverted solvatochromism. Phys Chem Chem Phys 2016; 18:32256-32265. [DOI: 10.1039/c6cp06708e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reverse solvatochromism of twenty “hybrid cyanine” dyes reflects their different responses to some properties of the solvent.
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Affiliation(s)
- Rafaela I. Stock
- Departamento de Química
- Universidade Federal de Santa Catarina
- UFSC
- CP 476
- Florianópolis
| | - Carlos E. A. de Melo
- Departamento de Química
- Universidade Federal de Santa Catarina
- UFSC
- CP 476
- Florianópolis
| | - Adriana D. S. Schramm
- Departamento de Química
- Universidade Federal de Santa Catarina
- UFSC
- CP 476
- Florianópolis
| | - Celso R. Nicoleti
- Departamento de Química
- Universidade Federal de Santa Catarina
- UFSC
- CP 476
- Florianópolis
| | | | - Renata da S. Heying
- Departamento de Química
- Universidade Federal de Santa Catarina
- UFSC
- CP 476
- Florianópolis
| | - Vanderlei G. Machado
- Departamento de Química
- Universidade Federal de Santa Catarina
- UFSC
- CP 476
- Florianópolis
| | - Marcos C. Rezende
- Facultad de Química y Biología
- Universidad de Santiago
- Av. B. O'Higgins 3363
- Santiago
- Chile
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Stock RI, Nandi LG, Nicoleti CR, Schramm ADS, Meller SL, Heying RS, Coimbra DF, Andriani KF, Caramori GF, Bortoluzzi AJ, Machado VG. Synthesis and Solvatochromism of Substituted 4-(Nitrostyryl)phenolate Dyes. J Org Chem 2015. [DOI: 10.1021/acs.joc.5b00983] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rafaela I. Stock
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
| | - Leandro G. Nandi
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
| | - Celso R. Nicoleti
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
| | - Adriana D. S. Schramm
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
| | - Sheila L. Meller
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
| | - Renata S. Heying
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
| | - Daniel F. Coimbra
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
| | - Karla F. Andriani
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
| | - Giovanni F. Caramori
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
| | - Adailton J. Bortoluzzi
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
| | - Vanderlei G. Machado
- Departamento de Química, Universidade Federal de Santa Catarina, UFSC, CP 476, Florianópolis, SC, 88040-900, Brazil
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