1
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Naldrett HJ, Abelt CJ. Turn-on fluorescence of a 6-acyl-1-benzoindole by alcohols. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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2
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Xu S, Pan W, Ren T, Huan S, Yuan L, Zhang X. Molecular Engineering of Novel Fluorophores for
High‐Contrast
Bioimaging. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100807] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shuai Xu
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Chemistry and Molecular Medicine Hunan University Changsha 410082 P. R. China
| | - Wenjing Pan
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Chemistry and Molecular Medicine Hunan University Changsha 410082 P. R. China
| | - Tian‐Bing Ren
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Chemistry and Molecular Medicine Hunan University Changsha 410082 P. R. China
| | - Shuang‐Yan Huan
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Chemistry and Molecular Medicine Hunan University Changsha 410082 P. R. China
| | - Lin Yuan
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Chemistry and Molecular Medicine Hunan University Changsha 410082 P. R. China
| | - Xiao‐Bing Zhang
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Chemistry and Molecular Medicine Hunan University Changsha 410082 P. R. China
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3
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Liu Y, Liang Z, Li Z, Zhao K, Sun Y, Zhang X, Yang R, Qu L. Anti-solvatochromic fluorescence of thiazole [5, 4-d] thiazole by forming hydrogen bond network and its application in fast detection of trace water. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104640] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Erdős M, Hartkamp R, Vlugt TJH, Moultos OA. Inclusion Complexation of Organic Micropollutants with β-Cyclodextrin. J Phys Chem B 2020; 124:1218-1228. [PMID: 31976678 PMCID: PMC7037149 DOI: 10.1021/acs.jpcb.9b10122] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
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Recently, β-cyclodextrin
(βCD)-based polymers with
enhanced adsorption kinetics and high removal capacity of organic
micropollutants (OMPs) and uptake rates have been synthesized and
tested experimentally. Although the exact physical–chemical
mechanisms via which these polymers capture the various types of OMPs
are not yet fully understood, it is suggested that the inclusion complex
formation of OMPs with βCD is very important. In this study,
the inclusion complex formation of OMPs with βCD in an aqueous
solution is investigated by using the well-established attach–pull–release
method in force field-based molecular dynamics simulations. A representative
set of OMPs is selected based on the measured occurrences in surface
and ground waters and the directives published by the European Union.
To characterize the formation of the inclusion complex, the binding
free energies, enthalpies, and entropies are computed and compared
to experimental values. It is shown that computations using the q4md-CD/GAFF/Bind3P
force field combination yield binding free energies that are in reasonable
agreement with the experimental results for all OMPs studied. The
binding enthalpies are decomposed into the main contributing interaction
types. It is shown that, for all studied OMPs, the van der Waals interactions
are favorable for the inclusion complexion and the hydrogen bond formation
of the guest with the solvent and βCD plays a crucial role in
the binding mechanism. Our findings show that MD simulations can adequately
describe the inclusion complex formation of βCD with OMPs, which
is the first step toward understanding the underlying mechanisms via
which the βCD-based polymers capture OMPs.
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Affiliation(s)
- Máté Erdős
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , Netherlands
| | - Remco Hartkamp
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , Netherlands
| | - Thijs J H Vlugt
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , Netherlands
| | - Othonas A Moultos
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , Netherlands
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5
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Domínguez M, Mera-Adasme R, Rezende MC. Insights into the halochromism of a bithiophene π* probe. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 222:117264. [PMID: 31212193 DOI: 10.1016/j.saa.2019.117264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 05/27/2019] [Accepted: 06/09/2019] [Indexed: 06/09/2023]
Abstract
The positive halochromism of the solvatochromic 4-nitro-4'-(N,N-dimethylamino)-2,2'-bithiophene in acetone and 1-butanol was investigated by molecular dynamics simulations and quantum mechanics calculations. Interactions of the dye with the solvated sodium cation were found to have only a minor effect on the observed halochromism, which was ultimately ascribed to a predominant interaction between iodide anions and the N,N-dimethylamino group of the dye.
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Affiliation(s)
- Moisés Domínguez
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Bernardo O'Higgins 3363, Chile.
| | - Raúl Mera-Adasme
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Bernardo O'Higgins 3363, Chile.
| | - Marcos Caroli Rezende
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Bernardo O'Higgins 3363, Chile
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6
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Vidal M, Pastenes C, Rezende MC, Aliaga C, Domínguez M. The inverted solvatochromism of protonated ferrocenylethenyl-pyrimidines: the first example of the solvatochromic reversal of a hybrid organic/inorganic dye. Org Chem Front 2019. [DOI: 10.1039/c9qo01043b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Five new solvatochromic 2,6-diaryl-4-ferrocenylethenylpyrimidines were synthesized and their spectral variations in solution investigated in twenty-seven solvents of variable polarity.
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Affiliation(s)
- Matías Vidal
- Facultad de Química y Biología
- Universidad de Santiago de Chile
- Santiago
- Chile
| | - Camila Pastenes
- Facultad de Química y Biología
- Universidad de Santiago de Chile
- Santiago
- Chile
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología
| | | | - Carolina Aliaga
- Facultad de Química y Biología
- Universidad de Santiago de Chile
- Santiago
- Chile
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología
| | - Moisés Domínguez
- Facultad de Química y Biología
- Universidad de Santiago de Chile
- Santiago
- Chile
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7
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Mera-Adasme R, Domínguez M. A computationally-derived model for the solvatochromism of p-phenolates with high predictive power. Phys Chem Chem Phys 2018; 20:18127-18132. [PMID: 29938260 DOI: 10.1039/c8cp02424c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We report that the positive, reverse or negative solvatochromism of p-phenolate-based dyes is highly correlated with the multireferential (MR) character of their ground-state wave function, with negative compounds presenting the highest degeneracy. CASSCF/NEVPT2 calculations show that the high MR character of the wave-function in negative dyes allows those systems to increase the dipole moment of the ground state by breaking the degeneracy as a response to the field of a polar solvent. The resulting stabilization of the ground-state with increasing solvent polarity leads to the observed negative solvatochromic behavior. A computational indicator based on our results has been successfully used for determining the direction of the solvatochromic shift of 24 dyes. Thus, our work sheds light on the physical-chemical basis for solvatochromism while providing experimental chemists with a practical tool for the design of novel negative, positive or reverse solvatochromic dyes.
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Affiliation(s)
- Raúl Mera-Adasme
- Departamento de Ciencias del Ambiente, Facultad de Qúímica y Biología, Universidad de Santiago de Chile (USACH), Chile.
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8
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Ren TB, Xu W, Zhang QL, Zhang XX, Wen SY, Yi HB, Yuan L, Zhang XB. Enhancing the Anti-Solvatochromic Two-Photon Fluorescence for Cirrhosis Imaging by Forming a Hydrogen-Bond Network. Angew Chem Int Ed Engl 2018; 57:7473-7477. [PMID: 29682856 DOI: 10.1002/anie.201800293] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Indexed: 01/10/2023]
Abstract
Two-photon imaging is an emerging tool for biomedical research and clinical diagnostics. Electron donor-acceptor (D-A) type molecules are the most widely employed two-photon scaffolds. However, current D-A type fluorophores suffer from solvatochromic quenching in aqueous biological samples. To address this issue, we devised a novel class of D-A type green fluorescent protein (GFP) chromophore analogues that form a hydrogen-bond network in water to improve the two-photon efficiency. Our design results in two-photon chalcone (TPC) dyes with 0.80 quantum yield and large two-photon action cross section (210 GM) in water. This strategy to form hydrogen bonds can be generalized to design two-photon materials with anti-solvatochromic fluorescence. To demonstrate the improved in vivo imaging, we designed a sulfide probe based on TPC dyes and monitored endogenous H2 S generation and scavenging in the cirrhotic rat liver for the first time.
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Affiliation(s)
- Tian-Bing Ren
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Wang Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Qian-Ling Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Xing-Xing Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Si-Yu Wen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Hai-Bo Yi
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Lin Yuan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Xiao-Bing Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
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9
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Ren TB, Xu W, Zhang QL, Zhang XX, Wen SY, Yi HB, Yuan L, Zhang XB. Enhancing the Anti-Solvatochromic Two-Photon Fluorescence for Cirrhosis Imaging by Forming a Hydrogen-Bond Network. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800293] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tian-Bing Ren
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 P. R. China
| | - Wang Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 P. R. China
| | - Qian-Ling Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 P. R. China
| | - Xing-Xing Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 P. R. China
| | - Si-Yu Wen
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 P. R. China
| | - Hai-Bo Yi
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 P. R. China
| | - Lin Yuan
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 P. R. China
| | - Xiao-Bing Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 P. R. China
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10
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Vidal M, Rezende MC, Pastene C, Aliaga C, Domínguez M. Solvatochromism of conjugated 4-N,N-dimethylaminophenyl-pyridinium donor–acceptor pairs. NEW J CHEM 2018. [DOI: 10.1039/c7nj04992g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of solvatochromic dyes consisting of an N,N-dimethylaminophenyl donor group conjugated with a 1-butylpyridinium acceptor ring through a 1,4-phenylene spacer were synthesized by a three-step procedure.
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11
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Yang Y, Li D, Li C, Liu Y, Jiang K. Hydrogen bond strengthening induces fluorescence quenching of PRODAN derivative by turning on twisted intramolecular charge transfer. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 187:68-74. [PMID: 28654834 DOI: 10.1016/j.saa.2017.06.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 06/21/2017] [Accepted: 06/22/2017] [Indexed: 06/07/2023]
Abstract
Researchers have proposed different effective mechanisms of hydrogen bonding (HB) on the fluorescence of 6-propionyl-2-dimethylaminonaphthalene (PRODAN) and its derivatives. Herein, excited state transition and dynamics analysis confirm that the fluorescence of PD (a derivative of PRODAN with ethyl replaced by 3-hydroxy-2,2-dimethylpropan) emits from the planar intramolecular charge transfer (PICT) state rather than twist ICT (TICT) state, because the fluorescence emission and surface hopping from the TICT state to the twist ground (T-S0) state is energy forbidden. Nevertheless, the strengthening of intramolecular-HB (intra-HB) and intermolecular-HB (inter-HB) of PD-(methanol)2 smooth the pathway of surface hopping from TICT to T-S0 state and the external conversion going to planar ground state by decreasing the energy difference of the two states. This smoothing changes the fluorescence state of PD-(methanol)2 to the TICT state in which fluorescence emission does not occur but surface hopping, leading to the partial fluorescence quenching of PD in methanol solvent. This conclusion is different from previous related reports. Moreover, the inter-HB strengthening of PD-methanol in PICT state induces the cleavage of intra-HB and a fluorescence red-shift of 54nm compared to PD. This red-shift increases to 66nm for PD-(methanol)2 for the strengthening of the one intra-HB and two inter-HBs. The dipole moments of PD-methanol and PD-(methanol)2 respectively increase about 10.3D and 8.1D in PICT state compared to PD. The synergistic effect of intra-HB and inter-HB induces partial quenching of PD in methanol solvent by turning on the TICT state and fluorescence red-shift. This work gives a reasonable description on the fluorescence red-shift and partial quenching of PD in methanol solvent, which will bring insight into the study of spectroscopic properties of molecules owning better spectral characteristics.
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Affiliation(s)
- Yonggang Yang
- College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China
| | - Donglin Li
- College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China
| | - Chaozheng Li
- College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China
| | - YuFang Liu
- College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China.
| | - Kai Jiang
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
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12
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Reissig HU, Domínguez M. N-Methylpyridinium-4-phenolates: Generation of a Betaine Dye Library Bearing Different Spacer Units and Their Solvatochromism. ChemistrySelect 2016. [DOI: 10.1002/slct.201601148] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hans-Ulrich Reissig
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustrasse 3 14195 Berlin Germany
| | - Moisés Domínguez
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustrasse 3 14195 Berlin Germany
- Facultad de Química y Biología; Universidad de Santiago de Chile; Avenida Libertador Bernardo O'Higgins 3363 Santiago Chile
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13
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Domínguez M, Rezende MC. A Monte Carlo-quantum mechanics study of a solvatochromic π* probe. J Mol Model 2016; 22:218. [PMID: 27553303 DOI: 10.1007/s00894-016-3083-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 08/05/2016] [Indexed: 11/28/2022]
Abstract
The solvation and the solvatochromic behavior of 5-(dimethylamino)-5'-nitro-2,2'-bithiophene 1, the basis of a π* scale of solvent polarities, was investigated theoretically in toluene, dichloromethane, methanol and formamide with a Monte Carlo and quantum mechanics (QM/MM) iterative approach. The calculated transition energies of the solvatochromic band of 1, obtained as averages of statistically uncorrelated configurations, including the solute and explicit solvent molecules of the first solvation layer, besides showing good agreement with the experimental transitions, reproduced very well the positive solvatochromism of this probe in various solvents.
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Affiliation(s)
- Moisés Domínguez
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Bernando O'Higgins 3363, Santiago, Chile.
- Facultad de Química y Biología, Universidad de Santiago, Casilla 40, Correo 33, Santiago, Chile.
| | - Marcos Caroli Rezende
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Bernando O'Higgins 3363, Santiago, Chile
- Facultad de Química y Biología, Universidad de Santiago, Casilla 40, Correo 33, Santiago, Chile
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14
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Singha S, Kim D, Roy B, Sambasivan S, Moon H, Rao AS, Kim JY, Joo T, Park JW, Rhee YM, Wang T, Kim KH, Shin YH, Jung J, Ahn KH. A structural remedy toward bright dipolar fluorophores in aqueous media. Chem Sci 2015; 6:4335-4342. [PMID: 29218204 PMCID: PMC5707477 DOI: 10.1039/c5sc01076d] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 05/17/2015] [Indexed: 12/13/2022] Open
Abstract
The donor-acceptor (D-A) type dipolar fluorophores, an important class of luminescent dyes with two-photon absorption behaviour, generally emit strongly in organic solvents but poorly in aqueous media. To understand and enhance the poor emission behaviour of dipolar dyes in aqueous media, we undertake a rational approach that includes a systematic structure variation of the donor, amino substituent of acedan, an important two-photon dye. We identify several factors that influence the emission behaviour of the dipolar dyes in aqueous media through computational and photophysical studies on new acedan derivatives. As a result, we can make acedan dyes emit bright fluorescence under one- and two-photon excitation in aqueous media by suppressing the liable factors for poor emission: 1,3-allylic strain, rotational freedom, and hydrogen bonding with water. We also validate that these findings can be generally extended to other dipolar fluorophores, as demonstrated for naphthalimide, coumarin and (4-nitro-2,1,3-benzoxadiazol-7-yl)amine (NBD) dyes. The new acedan and naphthalimide dyes thus allow us to obtain much brighter two-photon fluorescent images in cells and tissues than in their conventional forms. As an application of these findings, a thiol probe is synthesized based on a new naphthalimide dye, which shows greatly enhanced fluorescence from the widely used N,N-dimethyl analogue. The results disclosed here provide essential guidelines for the development of efficient dipolar dyes and fluorescence probes for studying biological systems, particularly by two-photon microscopy.
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Affiliation(s)
- Subhankar Singha
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
| | - Dokyoung Kim
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
| | - Basab Roy
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
| | - Sunderraman Sambasivan
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
| | - Hyunsoo Moon
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
| | - Alla Sreenivasa Rao
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
| | - Jin Yong Kim
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
| | - Taiha Joo
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
| | - Jae Woo Park
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
| | - Young Min Rhee
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
| | - Taejun Wang
- Division of Integrative Biosciences and Bio-technology , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784
| | - Ki Hean Kim
- Division of Integrative Biosciences and Bio-technology , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784
| | - Youn Ho Shin
- Department of Anatomy and Neurobiology , School of Medicine , Biomedical Science Institute , Kyung Hee University , 26 Kyungheedae-Ro, Dongdaemun-Gu , Seoul , Republic of Korea 130-701
| | - Junyang Jung
- Department of Anatomy and Neurobiology , School of Medicine , Biomedical Science Institute , Kyung Hee University , 26 Kyungheedae-Ro, Dongdaemun-Gu , Seoul , Republic of Korea 130-701
| | - Kyo Han Ahn
- Department of Chemistry , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-Ro, Nam-Gu , Pohang , Gyungbuk , Republic of Korea 790-784 .
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15
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Green AM, Abelt CJ. Dual-sensor fluorescent probes of surfactant-induced unfolding of human serum albumin. J Phys Chem B 2015; 119:3912-9. [PMID: 25710498 PMCID: PMC5597305 DOI: 10.1021/jp511252y] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two extrinsic fluorescent probes, 3-(dimethylamino)-8,9,10,11-tetrahydro-7H-cyclohepta[a]naphthalen-7-one (1) and 7-(dimethylamino)-2,3-dihydrophenanthren-4(1H)-one (2), are used to probe the unfolding of human serum albumin by sodium dodecyl sulfate (SDS). These probes respond separately to the polarity and H-bond-donating ability of their surroundings. Competitive binding experiments show that fluorophore 1 binds to site I (domain IIA) and 2 binds to site II (domain IIIA). The local acidity of 1 in site I is out of the sensing range of 1, whereas the local acidity of 2 in site II is calculated to be nearly zero on Catalan's solvent acidity index. Both probes show that the first two equivalents of bound SDS result in a decrease in the local polarity of the binding sites. Each subsequent equivalent of SDS gives rise to a dramatic increase in polarity until HSA is saturated with seven molecules of SDS at the end of the specific binding domain. Compound 2 experiences an increase of acidity of 0.10 on Catalan's solvent acidity index through seven equivalents of SDS, but the local acidity for 1 is still out of range. The increase in acidity experienced by 2 is greater than the increase in polarity. This result is consistent with greater exposure of the carbonyl group in 2, but not the bulk of 2, to the aqueous solvent in site II of the SDS-saturated HSA complex.
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Affiliation(s)
- Amy M Green
- Department of Chemistry, College of William and Mary , Williamsburg, Virginia 23185, United States
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16
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Li S, Zhang L, Wang B, Ma M, Xing P, Chu X, Zhang Y, Hao A. An easy approach for constructing vesicles by using aromatic molecules with β-cyclodextrin. SOFT MATTER 2015; 11:1767-1777. [PMID: 25608115 DOI: 10.1039/c4sm02339k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Vesicles were formed in aqueous solution using β-cyclodextrin (β-CD) complexes with a series of ultra-small aromatic molecules. The vesicles are easy to prepare without a complicated synthesis procedure and their structure was identified and characterized using various techniques, including transmission electron microscopy, atomic force microscopy and dynamic laser light scattering. Using the β-CD/l-phenylalanine system as a representative example, the structural factors that caused the self-assembly were revealed using proton nuclear magnetic resonance, Fourier transform infrared spectroscopy and X-ray diffraction. In addition, the vesicular architecture could be endowed with a diverse range of stimuli-responses, as a consequence of the selective addition of various guest molecules. It is anticipated that this novel assembly strategy could be further extended, and that it presents new opportunities for the development of nanocarriers and soft materials.
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Affiliation(s)
- Shangyang Li
- School of Chemistry and Chemical Engineering and Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, Shandong University, Jinan 250100, PR China.
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17
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Affiliation(s)
- Vanderlei G. Machado
- Departamento
de Química, Universidade Federal de Santa Catarina, UFSC, Florianópolis, SC 88040-900, Brazil
| | - Rafaela I. Stock
- Departamento
de Química, Universidade Federal de Santa Catarina, UFSC, Florianópolis, SC 88040-900, Brazil
| | - Christian Reichardt
- Fachbereich
Chemie, Philipps-Universität, Hans-Meerwein-Strasse, 35032 Marburg, Germany
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18
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Yoon AH, Whitworth LC, Wagner JD, Abelt CJ. 2,5-PRODAN derivatives as highly sensitive sensors of low solvent acidity. Molecules 2014; 19:6415-27. [PMID: 24853615 PMCID: PMC6270797 DOI: 10.3390/molecules19056415] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 05/08/2014] [Accepted: 05/12/2014] [Indexed: 12/02/2022] Open
Abstract
Two 5-acyl-2-dimethylaminonaphthalene derivatives, one with a propionyl group and the other with a fused cyclohexanone ring, are investigated as sensors of H-bond-donating ability in protic solvents of low solvent acidity. Their fluorescence is highly quenched in protic solvents, and the quenching order of magnitude is linearly related to the H-bond-donating ability of the solvent as quantified by the solvent acidity (SA) scale. As the solvent acidity increases from 0.15 to 0.40, the fluorescence for both is quenched by more than a factor of ten; thus, they are extremely sensitive sensors of the hydrogen-bond-donating ability in this weakly acidic range. Preferential solvation studies suggest that quenching occurs from a doubly H-bonded excited state.
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Affiliation(s)
- Alexandra H Yoon
- Department of Chemistry, College of William and Mary, Williamsburg, VA 23187-8795, USA
| | - Laura C Whitworth
- Department of Chemistry, College of William and Mary, Williamsburg, VA 23187-8795, USA
| | - Joel D Wagner
- Department of Chemistry, College of William and Mary, Williamsburg, VA 23187-8795, USA
| | - Christopher J Abelt
- Department of Chemistry, College of William and Mary, Williamsburg, VA 23187-8795, USA.
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19
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Nikitina YY, Iqbal ES, Yoon HJ, Abelt CJ. Preferential Solvation in Carbonyl-Twisted PRODAN Derivatives. J Phys Chem A 2013; 117:9189-95. [DOI: 10.1021/jp4076433] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Yuliia Y. Nikitina
- Department of Chemistry, College of William and Mary, Williamsburg, Virginia, 23185, United States
| | - Emil S. Iqbal
- Department of Chemistry, College of William and Mary, Williamsburg, Virginia, 23185, United States
| | - Hye Joo Yoon
- Department of Chemistry, College of William and Mary, Williamsburg, Virginia, 23185, United States
| | - Christopher J. Abelt
- Department of Chemistry, College of William and Mary, Williamsburg, Virginia, 23185, United States
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