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Cai Y, Pan Y, Liu L, Zhang T, Liang C, Mou X, Ye X, Wang W, Dong X. Succinct croconic acid-based near-infrared functional materials for biomedical applications. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Croconic Acid Doped Triglycine Sulfate: Crystal Structure, UV-Vis, FTIR, Raman, Photoluminescence Spectroscopy, and Dielectric Properties. CRYSTALS 2022. [DOI: 10.3390/cryst12050679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Triglycine sulfate (TGS) single crystals doped with croconic acid (CA) were grown by evaporation from aqueous solutions. X-ray diffraction analysis shows a slight reduction in unit cell volume in TGS:CA compared to pure TGS crystals. The polarized Raman and near-infrared absorption spectra show that the positions of most lines resulting from inter- and intramolecular vibrations are in good agreement with those in spectra of undoped TGS crystals. The inclusion of CA in TGS is confirmed by the presence of bands characteristic of CA in the infrared-Fourier transform spectra. The ultraviolet-visible absorption spectra of TGS:CA are characterized by the presence of additional absorption bands (compared to the spectra of pure TGS) located in the transparent region of pure TGS. In the photon energy region 1.6–3.6 eV, a strong “green” luminescence band is present in TGS:CA upon excitation at λ = 325 nm. The position of the emission band depends on the wavelength of the exciting light. Doping of TGS with CA causes pinning of domain walls, which is accompanied by a decrease in amplitude and frequency dispersion of the dielectric anomaly at the phase transition, a decrease in the switchable polarization and an increase in the coercive field of hysteresis loops.
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S Al-Otaibi J, Mary YS, Mary YS, Thomas R. Evidence of cluster formation of croconic acid with Ag, Au and Cu cages, enhancement of electronic properties and Raman activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 264:120233. [PMID: 34358780 DOI: 10.1016/j.saa.2021.120233] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/21/2021] [Accepted: 07/25/2021] [Indexed: 06/13/2023]
Abstract
Investigation of the adsorption properties croconic acid (CCA) with metal clusters (mC: Ag, Au and Cu) are reported using DFT method. CCA is found to form stable cluster with transition metal clusters of copper, silver and gold. The drug-cluster complexaton energy is slightly more for the copper nanocluster-drug complex. Non-covalent interaction analysis indicated that strong interactions and weak van der Waal interaction is present between drug and metal clusters. Dipole moment of the drug-gold cluster is found to be higher than that of the other systems. SERS studies demonstrates improved Raman signals for multiple wavenumbers of all CCA-metal cluster complexes. Mulliken charge analysis show that all CCA oxygen atom's charge changes due to the interactions with the mCs. Clustering of CCA with metal cages enhances the medicinal properties and the metal nanoclusters will act as a drug carrier of CCA.
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Affiliation(s)
- Jamelah S Al-Otaibi
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Saudi Arabia
| | | | | | - Renjith Thomas
- Deparment of Chemsitry, St Berchmans College (Autonomous), Mahatma Gandhi University, Changanassery, Kerala, India
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Jansen F, Lamla M, Mauthe D, Fischer S, Barth H, Kuehne AJC. Croconaine-Based Polymer Particles as Contrast Agents for Photoacoustic Imaging. Macromol Rapid Commun 2020; 41:e2000418. [PMID: 33047416 DOI: 10.1002/marc.202000418] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/28/2020] [Indexed: 12/12/2022]
Abstract
In the development and optimization of imaging methods, photoacoustic imaging (PAI) has become a powerful tool for preclinical biomedical diagnosis and detection of cancer. PAI probes can improve contrast and help identify pathogenic tissue. Such contrast agents must meet several requirements: they need to be biocompatible, and absorb strongly in the near-infrared (NIR) range, while relaxing the photoexcited state thermally and not radiatively. In this work, polymer nanoparticles are produced with croconaine as a monomer unit. Small molecular croconaine dyes are known to act as efficient pigments, which do not show photoluminescence. Here, for the first time croconaine copolymer nanoparticles are produced from croconic acid and a range of aromatic diamines. Following a dispersion polymerization protocol, this approach yields monodisperse particles of adjustable size. All synthesized polymers exhibit broad absorption within the NIR spectrum and therefore represent suitable candidates as contrast agents for PAI. The optical properties of these polymer particles are discussed with respect to the relation between particle size and outstanding photoacoustic performance. Biocompatibility of the polymer particles is demonstrated in cell viability experiments.
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Affiliation(s)
- Felicitas Jansen
- DWI-Leibniz Institute for Interactive Materials, Forckenbeckstraße 50, Aachen, 52074, Germany
| | - Markus Lamla
- Institute of Macromolecular and Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, Ulm, 89081, Germany
| | - Diana Mauthe
- Institute of Macromolecular and Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, Ulm, 89081, Germany
| | - Stephan Fischer
- Institute of Pharmacology and Toxicology, Ulm University Medical Center, Albert-Einstein-Allee 11, Ulm, 89081, Germany
| | - Holger Barth
- Institute of Pharmacology and Toxicology, Ulm University Medical Center, Albert-Einstein-Allee 11, Ulm, 89081, Germany
| | - Alexander J C Kuehne
- DWI-Leibniz Institute for Interactive Materials, Forckenbeckstraße 50, Aachen, 52074, Germany.,Institute of Macromolecular and Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, Ulm, 89081, Germany
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Patel AK, Mishra SK, Krishnamurthy K, Suryaprakash N. Retention of strong intramolecular hydrogen bonds in high polarity solvents in binaphthalene–benzamide derivatives: extensive NMR studies. RSC Adv 2019; 9:32759-32770. [PMID: 35529738 PMCID: PMC9073135 DOI: 10.1039/c9ra07299c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 10/07/2019] [Indexed: 11/21/2022] Open
Abstract
Advanced multidimensional NMR techniques have been employed to investigate the intramolecular hydrogen bonds (HBs) in a series of N,N′-([1,1′-binaphthalene]-2,2′-diyl)bis(benzamide) derivatives, with the site-specific substitution of different functional groups. The existence of intramolecular HBs and the elimination of any molecular aggregation and possible intermolecular HBs are ascertained by various experimental NMR techniques, including solvent polarity dependent modifications of HB strengths. In the fluorine substituted derivative, direct evidence for the engagement of organic fluorine in HB is obtained by the detection of heteronuclear through-space correlation and the coupling between two NMR active nuclei where the transmission of spin polarization is mediated through HBs (1hJFH). The extent of reduction in the strength of 1hJFH on dilution with high polarity solvents directly provided the qualitative measure of HB strength. The HB, although becoming weakened, does not get nullified even in pure high polarity solvent, which is attributed to the structural constraints. The rate of exchange of a labile hydrogen atom with the deuterium of the solvent permitted the measurement of their half-lives, that are correlated to the relative strengths of HBs. The experimental NMR findings are further validated by XRD and DFT-based theoretical computations, such as, NCI and QTAIM. NMR studies reveal very strong hydrogen bond unbreakable even in high polarity solvents.![]()
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Affiliation(s)
- Arun Kumar Patel
- Solid State and Structural Chemistry Unit and NMR Research Centre
- Indian Institute of Science
- Bangalore 560012
- India
- NMR Research Centre
| | | | | | - N. Suryaprakash
- Solid State and Structural Chemistry Unit and NMR Research Centre
- Indian Institute of Science
- Bangalore 560012
- India
- NMR Research Centre
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López-Carballeira D, Casanova D, Ruipérez F. Potential Use of Squarates and Croconates as Singlet Fission Sensitizers. Chemphyschem 2018; 19:2224-2233. [PMID: 29790641 DOI: 10.1002/cphc.201800329] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Indexed: 01/14/2023]
Abstract
The geometrical and electronic structures of 44 squarate and croconate derivatives are computationally studied by quantum chemistry methods, in the pursuit of new singlet fission sensitizers. A non-negligible singlet open-shell diradical character is observed for most of the studied molecules, which can be controlled through chemical substitution as well as by the size of the central ring. Such a diradical character is related to small singlet-triplet energy gaps, facilitating the accomplishment of the singlet fission energetic requirements. In general, the present results indicate that squarates hold superior singlet fission capabilities than croconates, although we have identified several derivatives within both families as promising singlet fission sensitizers.
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Affiliation(s)
- D López-Carballeira
- POLYMAT, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa 72, 20018, Donostia - San Sebastián, Spain
| | - D Casanova
- Donostia International Physics Center (DIPC) and Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), P.K. 1072, 20080, Donostia, Euskadi, Spain.,IKERBASQUE, Basque Foundation for Science, 48103, Bilbao, Euskadi, Spain
| | - F Ruipérez
- POLYMAT, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa 72, 20018, Donostia - San Sebastián, Spain
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Chen Y, Zhang H, Zhou W, Deng C, Liao J. The solvent effects on dimethyl phthalate investigated by FTIR characterization, solvent parameter correlation and DFT computation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 199:412-420. [PMID: 29649677 DOI: 10.1016/j.saa.2018.03.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 03/15/2018] [Accepted: 03/16/2018] [Indexed: 06/08/2023]
Abstract
This study set out with the aim of investigating the solvent effects on dimethyl phthalate (DMP) using FTIR characterization, solvent parameter correlation and DFT calculation. DMP exposed to 17 organic solvents manifested varying shift in the carbonyl stretching vibration frequency (νCO). Non-alkanols induced Band I and alkanols produced Band I and Band II. Through correlating the νCO with the empirical solvent scales including acceptor parameter (AN), Schleyer's linear free energy parameter (G), and linear free salvation energy relationships (LSER), Band I was mainly ascribed to non-specific effects from either non-alkanols or alkanol polymers ((alkanol)n). νCO of the latter indicated minor red shift and less variability compared to the former. An assumption was made and validated about the sequestering of hydroxyl group by the bulky hydrophobic chain in (alkanol)n, creating what we refer to as "screening effects". Ab initio calculation, on the other hand, provided insights for possible hydrogen binding between DMP and (ethanol)n or between ethanol monomers. The two components of Band I observed in inert solvents were assigned to the two CO groups adopting differentiated conformations. This in turn prompted our consideration that hydrogen binding was highly selective in favor of lowly associated (alkanol)n and the particular CO group having relatively less steric hindrance and stronger electron-donating capacity. Band II was therefore believed to derive from hydrogen-bond interactions mainly in manner of 1:1 and 1:2 DMP-(alkanol)n complexes.
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Affiliation(s)
- Yi Chen
- Department of Chemistry, Zhejiang Institute of Metrology, Tianmushan Road No. 222, Hangzhou 310007, Zhejiang, PR China.
| | - Hui Zhang
- Department of Chemistry, Zhejiang Institute of Metrology, Tianmushan Road No. 222, Hangzhou 310007, Zhejiang, PR China
| | - Wenzhao Zhou
- Department of Chemistry, Zhejiang Institute of Metrology, Tianmushan Road No. 222, Hangzhou 310007, Zhejiang, PR China
| | - Chao Deng
- Department of Chemistry, Zhejiang Institute of Metrology, Tianmushan Road No. 222, Hangzhou 310007, Zhejiang, PR China
| | - Jian Liao
- Department of Environmental Science and Engineering, Zhejiang University of Technology, Hangzhou 310004, Zhejiang, PR China
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Chetti P, Tripathi A. A comparative computational study of C N and C C bonding visible to NIR absorbing croconines. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.11.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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