51
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Tang J, Xie D, Yin HY, Jing J, Zhang JL. Cationic sulfonium functionalization renders Znsalens with high fluorescence, good water solubility and tunable cell-permeability. Org Biomol Chem 2016; 14:3360-8. [DOI: 10.1039/c6ob00249h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Introducing cationic sulfonium to the Znsalens skeleton circumvents aggregation arising from intermolecular Zn⋯O interactions (found between Zn and the phenoxyl group of another Znsalen molecule).
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Affiliation(s)
- Juan Tang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Da Xie
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Hao-Yan Yin
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Jing Jing
- School of Chemistry
- Beijing Institute of Technology
- Beijing 100081
- P.R. China
| | - Jun-Long Zhang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
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52
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Kocak A, Yilmaz H, Faiz O, Andac O. Experimental and theoretical studies on Cu(II) complex of N,N′-disalicylidene-2,3-diaminopyridine ligand reveal indirect evidence for DNA intercalation. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.11.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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53
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Consiglio G, Failla S, Fortuna CG, D’Urso L, Forte G. Aggregation of a Zn(II)-salen complex: Theoretical study of structure and spectra. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.05.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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54
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Tris(Znsalen) cryptand minimizes Znsalen aggregation arising from intermolecular Zn⋯O interaction. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2015.04.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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55
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Tang J, Cai YB, Jing J, Zhang JL. Unravelling the correlation between metal induced aggregation and cellular uptake/subcellular localization of Znsalen: an overlooked rule for design of luminescent metal probes. Chem Sci 2015; 6:2389-2397. [PMID: 28706655 PMCID: PMC5488197 DOI: 10.1039/c4sc03824j] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 01/21/2015] [Indexed: 01/08/2023] Open
Abstract
Unravelling the unique effects of metal coordination on biological behaviours is of importance to design metal based therapeutic and diagnostic agents. In this work, we chose luminescent Znsalen (ZnL1 ) as a case study to demonstrate that metal induced aggregation arising from the intermolecular Zn···O interaction influences its cellular uptake and subcellular localization. Comparative studies with the free bases (L1 and L2 ) show that ZnL1 undergoes cellular uptake through caveolae-mediated endocytosis and internalizes in endosomal/lysosomal compartments, in contrast to the localization of L1 and L2 in the mitochondria. Further studies of photophysical properties, TEM imaging and DLS analysis suggest that ZnL1 tends to form large sized fibrous structures in aqueous media. To investigate the relationship between ZnL1 aggregation and the biological behaviour, we used pyridine to tune the "aggregation-to-deaggregation" transition and found that, in the presence of pyridine, ZnL1 could localize in the mitochondria and internalize into cells through the passive diffusion pathway. Such distinctive biological behaviours resulting from the different Znsalen species clearly point out the importance of metal induced aggregation or metal speciation analysis in designing metal complexes as biological probes.
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Affiliation(s)
- Juan Tang
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China .
| | - Yuan-Bo Cai
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China .
| | - Jing Jing
- School of Chemistry , Beijing Institute of Technology , Beijing 100081 , P. R. China
| | - Jun-Long Zhang
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , P. R. China .
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56
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Paul MK, Dilipkumar Singh Y, Bedamani Singh N, Sarkar U. Emissive bis-salicylaldiminato Schiff base ligands and their zinc(II) complexes: Synthesis, photophysical properties, mesomorphism and DFT studies. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.10.031] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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57
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García-Valle FM, Estivill R, Gallegos C, Cuenca T, Mosquera MEG, Tabernero V, Cano J. Metal and Ligand-Substituent Effects in the Immortal Polymerization of rac-Lactide with Li, Na, and K Phenoxo-imine Complexes. Organometallics 2015. [DOI: 10.1021/om501000b] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Francisco M. García-Valle
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Robert Estivill
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Carlos Gallegos
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Tomás Cuenca
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Marta E. G. Mosquera
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Vanessa Tabernero
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Jesús Cano
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
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58
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Wang XM, Chen S, Fan RQ, Zhang FQ, Yang YL. Facile luminescent tuning of ZnII/HgII complexes based on flexible, semi-rigid and rigid polydentate Schiff bases from blue to green to red: structural, photophysics, electrochemistry and theoretical calculations studies. Dalton Trans 2015; 44:8107-25. [DOI: 10.1039/c5dt00057b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photophysical properties of ZnII/HgII Schiff base complexes could be tuned by changing the ligand structures.
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Affiliation(s)
- Xin-Ming Wang
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
- P. R. of China
| | - Shuo Chen
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
- P. R. of China
| | - Rui-Qing Fan
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
- P. R. of China
| | - Fu-Qiang Zhang
- Department of Chemistry
- Shangqiu Normal University
- Shangqiu 476000
- P. R. of China
| | - Yu-Lin Yang
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
- P. R. of China
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59
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Hens A, Mondal P, Rajak KK. Selective H2PO4− anion sensing by two neutral Zn2+ complexes and combined theoretical and experimental studies of their structural and spectral properties. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.08.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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60
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Consiglio G, Oliveri IP, Punzo F, Thompson AL, Di Bella S, Failla S. Structure and aggregation properties of a Schiff-base zinc(ii) complex derived from cis-1,2-diaminocyclohexane. Dalton Trans 2015; 44:13040-8. [PMID: 26103462 DOI: 10.1039/c5dt01148e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The effect of the bridging diamine upon the aggregation properties of a ZnII Schiff-base complex is reported. The X-ray crystal structure indicates the presence of an asymmetric dimer which is preserved even in solution.
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Affiliation(s)
- Giuseppe Consiglio
- Dipartimento di Ingegneria Industriale
- Università di Catania
- I-95125 Catania
- Italy
| | | | - Francesco Punzo
- Dipartimento di Scienze del Farmaco
- Sezione Chimica
- Università di Catania
- I-95125 Catania
- Italy
| | - Amber L. Thompson
- Chemical Crystallography
- Department of Chemistry
- University of Oxford
- Oxford OX1 3TA
- UK
| | - Santo Di Bella
- Dipartimento di Scienze Chimiche
- Università di Catania
- I-95125 Catania
- Italy
| | - Salvatore Failla
- Dipartimento di Ingegneria Industriale
- Università di Catania
- I-95125 Catania
- Italy
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61
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Cheng J, Li Y, Sun R, Liu J, Gou F, Zhou X, Xiang H, Liu J. Functionalized Salen ligands linking with non-conjugated bridges: unique and colorful aggregation-induced emission, mechanism, and applications. JOURNAL OF MATERIALS CHEMISTRY C 2015. [DOI: 10.1039/c5tc02555a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A series of novel, simple, and useful Salen ligands (56 samples) linking with different non-conjugated alkyl bridges have a small π-conjugated system but exhibit strong red, green, and blue AIE.
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Affiliation(s)
| | - Yuanxi Li
- Laboratory of Stem Cell Biology
- State Key Laboratory of Biotherapy
- West China Hospital
- Sichuan University
- Chengdu
| | - Rui Sun
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Jiaoyan Liu
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Fei Gou
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Xiangge Zhou
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | | | - Jin Liu
- Laboratory of Stem Cell Biology
- State Key Laboratory of Biotherapy
- West China Hospital
- Sichuan University
- Chengdu
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62
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Chakraborty S, Bhattacharjee CR, Mondal P, Prasad SK, Rao DSS. Synthesis and aggregation behaviour of luminescent mesomorphic zinc(ii) complexes with ‘salen’ type asymmetric Schiff base ligands. Dalton Trans 2015; 44:7477-88. [DOI: 10.1039/c4dt03989k] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mesomorphism and solvent dependent aggregation behaviour of a new series of photoluminescent Zn(ii)-salen type asymmetric Schiff base complexes have been investigated.
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63
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Hens A, Maity A, Rajak KK. N , N coordinating schiff base ligand acting as a fluorescence sensor for zinc(II) and colorimetric sensor for copper(II), and zinc(II) in mixed aqueous media. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.08.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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64
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Oliveri IP, Malandrino G, Di Bella S. Phase Transition and Vapochromism in Molecular Assemblies of a Polymorphic Zinc(II) Schiff-Base Complex. Inorg Chem 2014; 53:9771-7. [DOI: 10.1021/ic5013632] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ivan Pietro Oliveri
- Dipartimento
di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
| | | | - Santo Di Bella
- Dipartimento
di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
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65
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Structure, aggregation and spectroscopic properties of self-assembled Zn(II) Schiff base complexes. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2014.03.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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66
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Oliveri IP, Malandrino G, Di Bella S. Self-assembled nanostructures of amphiphilic zinc(II) salophen complexes: role of the solvent on their structure and morphology. Dalton Trans 2014; 43:10208-14. [PMID: 24875135 DOI: 10.1039/c4dt00973h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
This contribution explores the effect of several solvent properties, such as volatility, polarity, and Lewis basicity on the formation of molecular self-assembled nanostructures in the solid state, obtained either by casting of related solutions or by complete solvent evaporation, using seven solvents representative of common classes of coordinating organic solvents, of an amphiphilic Zn(II) Schiff-base complex. In all cases, the existence of well-defined X-ray diffraction patterns, for both the cast and powder samples, indicates a strong tendency towards the molecular self-assembly of such complexes. While nanostructures formed in acetone, THF, pyridine, and DMF have a lamellar organization, those formed in ACN, ethanol, and DMSO exhibit a 2D columnar square structure. Field emission scanning electron microscopy analysis indicates that nanostructures formed in volatile acetone, THF, ACN, and ethanol solvents show a fibrous morphology, while those formed in less volatile pyridine, DMF, and DMSO have a ribbon appearance. Overall, the results indicate that while the formation of such nanostructures is independent of the Lewis basicity of the solvent, the solvent polarity affects their structure - more polar solvents favour higher symmetry structures - and the solvent volatility influences their morphology and ordering in the cast films - lower volatility of the solvent parallels the formation of much more ordered structures. Therefore, the appropriate choice of solvent allows control of the structure, morphology, and ordering of these molecular assemblies.
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Affiliation(s)
- Ivan Pietro Oliveri
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.
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67
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Martin E, Martínez Belmonte M, Escudero-Adán EC, Kleij AW. Exploring the Building-Block Potential of Readily Accessible Chiral [Zn(salen)] Complexes. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402101] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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68
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Cheng J, Ma X, Zhang Y, Liu J, Zhou X, Xiang H. Optical chemosensors based on transmetalation of salen-based Schiff base complexes. Inorg Chem 2014; 53:3210-9. [PMID: 24559169 DOI: 10.1021/ic5000815] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We report our systematic studies of novel, simple, selective, and sensitive optical (both colorimetric and fluorescent) chemosensors for detecting Al(3+) based on transmetalation reactions (metal displacement or exchange reactions) of a series of K(I), Ca(II), Zn(II), Cu(II), and Pt(II) complexes containing different ligands of salen-based Schiff bases. Both the chemical structure of the salen ligand and the identity of the central metal ion have a tremendous impact on the sensing performance, which is mainly determined by the stability constant of the complex. Moreover, the selectivities of the salen-complex-based chemosensors are much better than those of the corresponding free salen ligands because of the shielding function of the filled-in metal ion in the complex. Therefore, the present work potentially provides a new and simple way to design optical probes via complex-based transmetalation reactions.
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Affiliation(s)
- Jinghui Cheng
- College of Chemistry, Sichuan University , Chengdu 610041, China
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69
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Salassa G, Ryan JW, Escudero-Adán EC, Kleij AW. Spectroscopic properties of Zn(salphenazine) complexes and their application in small molecule organic solar cells. Dalton Trans 2014; 43:210-21. [DOI: 10.1039/c3dt52034j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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70
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Kaur K, Kaur M, Kaur A, Singh J, Singh N, Mittal SK, Kaur N. Polymer-based biocompatible fluorescent sensor for nano-molar detection of Zn2+ in aqueous medium and biological samples. Inorg Chem Front 2014. [DOI: 10.1039/c3qi00031a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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71
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Oliveri IP, Failla S, Colombo A, Dragonetti C, Righetto S, Di Bella S. Synthesis, characterization, optical absorption/fluorescence spectroscopy, and second-order nonlinear optical properties of aggregate molecular architectures of unsymmetrical Schiff-base zinc(ii) complexes. Dalton Trans 2014; 43:2168-75. [DOI: 10.1039/c3dt53072h] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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72
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Pregosin PS. NMR diffusion: an update. Acta Crystallogr C 2013; 69:1433-6. [DOI: 10.1107/s0108270113029661] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 10/28/2013] [Indexed: 11/10/2022] Open
Abstract
NMR diffusion methods continue to attract increasing attention from practising chemists. This short article summarizes some of the more recent developments and highlights the areas in which these methods are finding application, specifically: estimating molecular volumes; investigating the degree of aggregation (especially in salts); studying host–guest interactions; recognizing hydrogen bonds; and directly proving the presence and extent of ion pairing.
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73
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Zhang Z. Synthesis and crystal structure of a trinuclear copper(II) complex derived from N,N′-Bis(4-methoxysalicylidene)-1,3-pentanediamine. RUSS J COORD CHEM+ 2013. [DOI: 10.1134/s1070328413100126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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74
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Gallegos C, Tabernero V, Garcı́a-Valle FM, Mosquera MEG, Cuenca T, Cano J. Synthesis and Structure of Homo- and Heterometallic Lithium–Magnesium Complexes and Their Reactivity in the ROP of rac-Lactide. Organometallics 2013. [DOI: 10.1021/om400940f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Carlos Gallegos
- Dpto
de Quı́mica Inorgánica, Universidad de Alcalá, 28871 Alcalá de Henares, Spain
| | - Vanessa Tabernero
- Dpto
de Quı́mica Inorgánica, Universidad de Alcalá, 28871 Alcalá de Henares, Spain
| | | | - Marta E. G. Mosquera
- Dpto
de Quı́mica Inorgánica, Universidad de Alcalá, 28871 Alcalá de Henares, Spain
| | - Tomás Cuenca
- Dpto
de Quı́mica Inorgánica, Universidad de Alcalá, 28871 Alcalá de Henares, Spain
| | - Jesús Cano
- Dpto
de Quı́mica Inorgánica, Universidad de Alcalá, 28871 Alcalá de Henares, Spain
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75
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Jurček O, Cametti M, Pontini M, Kolehmainen E, Rissanen K. A zinc-salophen/bile-acid conjugate receptor solubilized by CTABr micelles binds phosphate in water. Org Biomol Chem 2013; 11:4585-90. [PMID: 23774968 DOI: 10.1039/c3ob40724a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Receptor 1, composed of two deoxycholic acid moieties appended to a Zn-salophen complex, was prepared, characterized and tested for anion binding by (1)H NMR and UV-vis spectroscopic techniques. While in polar DMSO, 1 is able to bind phosphate (K = ∼700 M(-1)), the addition of water severely diminishes the association. In a 1 : 9 water-DMSO mixture, the binding constant K is only ca. 20 M(-1). Notably, in an aqueous solution of CTABr micelles (CTABr 10 mM, cmc = ∼1 mM), the zinc-salophen conjugate 1, due to its two non-polar bile-acid moieties, becomes solubilized and, most importantly, it almost completely recovers its binding ability towards phosphate, displaying a remarkable affinity (K = ∼450 M(-1)) in water.
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Affiliation(s)
- Ondřej Jurček
- Laboratory of Organic Chemistry, Department of Chemistry, P.O. Box 35, 40014, Jyväskylä, Finland
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76
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Chiang HW, Su YT, Wu JY. Ligand dissociation/recoordination in fluorescent ionic zinc–salicylideneimine compounds: synthesis, characterization, photophysical properties, and 1H NMR studies. Dalton Trans 2013; 42:15169-82. [DOI: 10.1039/c3dt51226f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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77
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Hens A, Mondal P, Rajak KK. Synthesis, structure and spectral properties of O,N,N coordinating ligands and their neutral Zn(ii) complexes: a combined experimental and theoretical study. Dalton Trans 2013; 42:14905-15. [DOI: 10.1039/c3dt51571k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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78
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Brissos R, Ramos D, Lima JC, Mihan FY, Borràs M, de Lapuente J, Cort AD, Rodríguez L. Luminescent zinc salophen derivatives: cytotoxicity assessment and action mechanism studies. NEW J CHEM 2013. [DOI: 10.1039/c3nj41125g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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79
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Meng QH, Zhou P, Song F, Wang YB, Liu GL, Li H. Controlled fluorescent properties of Zn(ii) salen-type complex based on ligand design. CrystEngComm 2013. [DOI: 10.1039/c3ce26935c] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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80
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Li BH, et al.. Crystal structure of bis-{1-[1-(3-aminopentylimino)ethyl]naphthalen-2- olato}nickel(II), [Ni(C17H21N2O)2], C34H42N4NiO2. Z KRIST-NEW CRYST ST 2012. [DOI: 10.1524/ncrs.2012.0227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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81
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Consiglio G, Failla S, Finocchiaro P, Oliveri IP, Di Bella S. An Unprecedented Structural Interconversion in Solution of Aggregate Zinc(II) Salen Schiff-Base Complexes. Inorg Chem 2012; 51:8409-18. [DOI: 10.1021/ic300954y] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giuseppe Consiglio
- Dipartimento di
Ingegneria Industriale, Università di Catania, I-95125 Catania, Italy
| | - Salvatore Failla
- Dipartimento di
Ingegneria Industriale, Università di Catania, I-95125 Catania, Italy
| | - Paolo Finocchiaro
- Dipartimento di
Ingegneria Industriale, Università di Catania, I-95125 Catania, Italy
| | - Ivan Pietro Oliveri
- Dipartimento di
Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
| | - Santo Di Bella
- Dipartimento di
Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
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82
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Salassa G, Coenen MJJ, Wezenberg SJ, Hendriksen BLM, Speller S, Elemans JAAW, Kleij AW. Extremely strong self-assembly of a bimetallic salen complex visualized at the single-molecule level. J Am Chem Soc 2012; 134:7186-92. [PMID: 22475214 DOI: 10.1021/ja3030802] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A bis-Zn(salphen) structure shows extremely strong self-assembly both in solution as well as at the solid-liquid interface as evidenced by scanning tunneling microscopy, competitive UV-vis and fluorescence titrations, dynamic light scattering, and transmission electron microscopy. Density functional theory analysis on the Zn(2) complex rationalizes the very high stability of the self-assembled structures provoked by unusual oligomeric (Zn-O)(n) coordination motifs within the assembly. This coordination mode is strikingly different when compared with mononuclear Zn(salphen) analogues that form dimeric structures having a typical Zn(2)O(2) central unit. The high stability of the multinuclear structure therefore holds great promise for the development of stable self-assembled monolayers with potential for new opto-electronic materials.
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Affiliation(s)
- Giovanni Salassa
- Institute of Chemical Research of Catalonia, Av. Països Catalans 16, 43007, Tarragona, Spain
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83
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Martínez Belmonte M, Escudero-Adán EC, Martin E, Kleij AW. Isolation and characterization of unusual multinuclear Schiff base complexes: rearrangements reactions and octanuclear cluster formation. Dalton Trans 2012; 41:5193-200. [DOI: 10.1039/c2dt30201b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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84
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Di Bella S, Oliveri IP, Colombo A, Dragonetti C, Righetto S, Roberto D. An unprecedented switching of the second-order nonlinear optical response in aggregate bis(salicylaldiminato)zinc(ii) Schiff-base complexes. Dalton Trans 2012; 41:7013-6. [DOI: 10.1039/c2dt30702b] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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85
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Oliveri IP, Di Bella S. Sensitive fluorescent detection and Lewis basicity of aliphatic amines. J Phys Chem A 2011; 115:14325-30. [PMID: 22066575 DOI: 10.1021/jp2066265] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this contribution is reported the sensitive properties of the Zn(II) Schiff base complex, 1, in dichloromethane with respect a series of primary, secondary, and tertiary aliphatic amines through the study of fluorescence enhancement upon amine coordination to the Lewis acidic Zn(II) metal center with formation of 1:1 adducts. It is found that complex 1 exhibits selectivity and nanomolar sensitivity for primary and alicyclic amines. A distinct selectivity is also observed along the series of secondary or tertiary amines, paralleling the increasing steric hindrance at the nitrogen atom. The binding interaction can be related to the Lewis basicity of the coordinating amine; thus, complex 1 represents a suitable reference Lewis acid, and estimated binding constants within the investigated amine series can be related to their relative Lewis basicity. A relative order of the Lewis basicity can be established for acyclic amines, primary > secondary > tertiary, while an inverted order, tertiary > secondary ≈ primary (acyclic), is found in the case of alicyclic amines. The present approach represents a simple, suitable method to ranking the relative Lewis basicity of aliphatic amines in low-polarity, nonprotogenic solvents.
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86
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Oliveri IP, Maccarrone G, Di Bella S. A Lewis basicity scale in dichloromethane for amines and common nonprotogenic solvents using a zinc(II) Schiff-base complex as reference Lewis acid. J Org Chem 2011; 76:8879-84. [PMID: 21955183 DOI: 10.1021/jo2016218] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A consistent, reliable scale of Lewis basicity in dichloromethane for 26 bases, involving amines and nonprotogenic solvents, is presented. A Lewis acidic Zn(II) Schiff-base complex, involving formation of stable 1:1 adducts is used as reference acid. Evaluation of binding constants is achieved from spectrophotometric titrations, by the least-squares nonlinear regression of multiwavelength spectrophotometric data. This Lewis basicity scale represents a unique set of data reflecting the actual Lewis basicity with respect this "real world" Lewis acidic species. The comparison of present Lewis basicity scale with data reported in the literature indicates that while for the involved solvents their relative basicity is scarcely affected by the reference Lewis acid, in contrast for sterically encumbered amines the Lewis basicity seems to be dependent from the reference species. Thus, Lewis basicity is governed by the steric hindrance at the donor atom and involves very different relative basicities than those predicted considering typical reference Lewis acids. This is expected to have a major involvement in the organic synthesis and catalysis, given the sterically encumbered nature of commonly involved Lewis acidic organometallic complexes.
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Affiliation(s)
- Ivan Pietro Oliveri
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy
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87
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Oliveri IP, Failla S, Malandrino G, Bella SD. New molecular architectures by aggregation of tailored zinc(ii) Schiff-base complexes. NEW J CHEM 2011. [DOI: 10.1039/c1nj20618d] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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