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Hou Z, Huang Y, Ruan Y, Xu H, Tan Y, Lin LR, Wu ZY. Reversible trans-to- cis photoisomerization and irreversible photocyclization reactions of a Co-coordinated stilbene derivative on chiral di-β-diketonate lanthanide complexes. RSC Adv 2023; 13:2269-2282. [PMID: 36741132 PMCID: PMC9837704 DOI: 10.1039/d2ra07133a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 01/02/2023] [Indexed: 01/15/2023] Open
Abstract
Six lanthanide complexes constructed from two chiral β-diketonates (d/l-fbc = 3-heptafluorobutyryl-(+)/(-)-camphorate), the stilbene derivative (E)-N',N'-bis(pyridin-2-ylmethyl)-4-styrylbenzoyl hydrazide (L), a trifluoroacetate anion (CF3CO2 -), and one water molecule, namely [Ln(d/l-fbc)2(L)(CF3CO2)]·H2O (LnC57H54F17N4O8, Ln = La (1, d-fbc), La (2, l-fbc), Sm (3, d-fbc), Eu (4, d-fbc), Eu (5, l-fbc), and Tb (6, d-fbc), were synthesized and characterized by single-crystal X-ray diffraction, 1H-NMR, elemental analysis, IR and UV-vis spectroscopy, and thermal gravimetric analysis. The photoisomerization reactions of these complexes were systematically studied by means of experimental and theoretical calculations. Crystals of complexes 1, 2, 3, and 4 were obtained and belong to the monoclinic crystal system and the C2 chiral space group. The Λ- and Δ-diastereomers coexist in their crystals and no apparent bisignate couplets are observed in their ECD spectra. Among the complexes, the photocyclization reaction is followed by the trans-to-cis photoisomerization reaction and competes with the trans-to-cis photoisomerization, then the photocyclization reaction continues. The photocyclization reaction is irreversible in this stilbene derivative and is delayed in the lanthanide complexes. These results provide a viable strategy for the design of promising new stilbene-attached dual-functional lanthanide-based optical-switching materials.
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Affiliation(s)
- Ziting Hou
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
| | - Yanji Huang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
| | - Yushan Ruan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
| | - Han Xu
- School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical UniversityKunming650500P. R. China
| | - Yu Tan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
| | - Li-Rong Lin
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
| | - Zhen-yi Wu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen UniversityXiamen361005P. R. China
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Xian T, Meng Q, Gao F, Hu M, Wang X. Functionalization of luminescent lanthanide complexes for biomedical applications. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Juan Liang W, Xin Wu W, Lu Z, Feng Bai Y, Feng F, Jun Jin W. Stimulus responsive luminescence and application of rotor type 1,1'-([2,2'-bithiophene]-3,3'-diyl)bis(ethan-1-one) and 3'-acetyl-[2,2'-bithiophene]-3-carbaldehyde as molecular rotors. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 279:121395. [PMID: 35605424 DOI: 10.1016/j.saa.2022.121395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 05/05/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
Two dithiophene aldehyde/ketone derivatives are designed as luminescence molecular rotors, i.e., 1,1'-([2,2'-bithiophene]-3,3'-diyl)bis(ethan-1-one) (BTBE) and 3'-acetyl-[2,2'-bithiophene]-3-carbaldehyde (BTAC). Their absorption and luminescence properties, as well as the stimulus responsive luminescence characteristics of water spikes are studied in detail. In order to further explore relationship of luminescence and molecular structure, three reference compounds are also synthesized, named 1-(2-methylthiophen-3-yl)ethanone (MTE), 2-methylthiophene-3-carbaldehyde (MTC) and 4H-cyclohepta[1,2-b:7,6-b']dithiophen-4-one (CDTO). BTBE and BTAC have two obvious absorption bands in the short wavelength region with peak wavelengths of about 212 nm and 260 nm, respectively, while there is a weak trailing type absorption band in the range of about 300-400 nm. Their fluorescence spectra show two luminescence bands in the range of 280-350 nm and 400-600 nm, respectively, and the latter is stronger. Compared with the absorption and luminescence spectra of the reference compounds, it is determined that two absorption bands of BTBE and BTAC in shorter wavelength region are derived from the single thiophene ring carbonyl planar unit, while the absorption band in longer region are derived from the integrated structure of dithiophene carbonyl. The fluorescence bands with peaks of about 300 nm and 470 nm originate respectively from the localized F-C vertical excited states (LE), i.e., the excited state from single planar thienyl-carbonyl unit, and integrated excited state (IE), i.e., the excited state from integrated di-thienyl-carbonyl rings linked covalently with less dihedral angle and greater degree of conjugation at excited state. The crystal structure data show that two thiophene rings possess larger dihedral angles in crystal states, 86.9° for BTBE and 60.8° for BTAC, respectively. However, theoretical calculation results prove the conformational stabilization energy changes little, less than 1.5 kcal/mol, as dihedral angle changes from 50° to 100°. Hydrogen bonding is sufficient to overcome the energy required for this conformational change. Therefore, both BTBE and BTAC can produce water stimulation response luminescence behavior. This stimulating response behavior of BTBE and BTAC can be applied to the preparation of water writable film materials.
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Affiliation(s)
- Wen Juan Liang
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, Shanxi 037009, PR China
| | - Wen Xin Wu
- College of Chemistry, Beijing Normal University, Beijing 100875, PR China
| | - Zhen Lu
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, Shanxi 037009, PR China
| | - Yun Feng Bai
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, Shanxi 037009, PR China
| | - Feng Feng
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, Shanxi 037009, PR China.
| | - Wei Jun Jin
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, Shanxi 037009, PR China; College of Chemistry, Beijing Normal University, Beijing 100875, PR China.
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Wu S, Galán LA, Roux M, Riobé F, Le Guennic B, Guyot Y, Le Bahers T, Micouin L, Maury O, Benedetti E. Tuning Excited-State Properties of [2.2]Paracyclophane-Based Antennas to Ensure Efficient Sensitization of Lanthanide Ions or Singlet Oxygen Generation. Inorg Chem 2021; 60:16194-16203. [PMID: 34637309 DOI: 10.1021/acs.inorgchem.1c01986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The multistep synthesis of original antennas incorporating substituted [2.2]paracyclophane (pCp) moieties in the π-conjugated skeleton is described. These antennas, functionalized with an electron donor alkoxy fragment (A1) or with a fused coumarin derivative (A2), are incorporated in a triazacyclonane macrocyclic ligand L1 or L2, respectively, for the design of Eu(III), Yb(III), and Gd(III) complexes. A combined photophysical/theoretical study reveals that A1 presents a charge transfer character via through-space paracyclophane conjugation, whereas A2 presents only local excited states centered on the coumarin-paracyclophane moiety, strongly favoring triplet state population via intersystem crossing. The resulting complexes EuL1 and YbL2 are fully emissive in red and near-infrared, respectively, whereas the GdL2 complex acts as a photosensitizer for the generation of singlet oxygen.
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Affiliation(s)
- Shiqi Wu
- Univ Paris, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, 45 Rue des Saints Pères, 75006 Paris, France
| | - Laura Abad Galán
- Univ Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, Lyon F-69342, France
| | - Margaux Roux
- Univ Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, Lyon F-69342, France
| | - François Riobé
- Univ Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, Lyon F-69342, France
| | - Boris Le Guennic
- Univ Rennes, ISCR (Institut des Sciences Chimiques de Rennes), CNRS UMR 6226, F-35000 Rennes, France
| | - Yannick Guyot
- Univ Lyon, Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306, 10 Rue Ada Byron, 69622 Villeurbanne Cedex, France
| | - Tangui Le Bahers
- Univ Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, Lyon F-69342, France
| | - Laurent Micouin
- Univ Paris, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, 45 Rue des Saints Pères, 75006 Paris, France
| | - Olivier Maury
- Univ Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, Lyon F-69342, France
| | - Erica Benedetti
- Univ Paris, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, 45 Rue des Saints Pères, 75006 Paris, France
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