Derivatives of Bis(2,2′-bipyridyl)dicyanoiron(II) with Long Alkyl Chains − Versatile Solvatochromic Probes that Form Metalloaggregates in Water-Rich Media

Gameiro, Paula; Pereira, Eulália; García, Paula; Breia, Sónia; Burgess, John; Castro, Baltazar de

doi:10.1002/1099-0682(200111)2001:11<2755::aid-ejic2755>3.0.co;2-l

Cited by 18 publications

(15 citation statements)

References 12 publications

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“…with long alkyl groups are solvatochromic probes that aggregate in water-rich media. 33 [Fe(qtpy) 2 ](ClO 4 ) 2 is the first crystallographically established bis(quaterpyridine) complex. 34 Each ligand is only terdentate, with a terminal pyridine nitrogen uncoordinated, and the average Fe-N distance is some 0.26 Å longer than in [Fe(terpy) 2 ] 2ϩ , suggesting considerable mismatch of metal ion and ligand cavity.…”

Section: N-donorsmentioning

confidence: 99%

14 Iron, cobalt and nickel

Cotton¹

2002

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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Section: N-donorsmentioning

confidence: 99%

14 Iron, cobalt and nickel

Cotton¹

2002

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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“…Consequently, these metallic compounds display the characteristic properties of a surfactant (surface activity and self-assembly) and are a useful tool for achieving unique arrangements with metallic compounds such as concentrating metals in the interfaces or forming metal aggregates of different sizes (micelles and vesicles). Although this is a relatively new research field, , the singular properties of these compounds have been oriented to a wide range of potential applications including magnetic resonance imaging, templates for mesoporous materials, metallomesogens, optoelectronic devices, solvatochromic probes, homogeneous catalysis, medicine, and nanoparticles . Other works have been devoted to metal-containing soft materials or to the study of metallosurfactants of different metals such as cadmium(II), chromium(III), cobalt(III), , copper(II), − iron(II), nickel(II), rhodium(I), ruthenium(II), , and zinc(II) .…”

Section: Introductionmentioning

confidence: 99%

New Surfactant Phosphine Ligands and Platinum(II) Metallosurfactants. Influence of Metal Coordination on the Critical Micelle Concentration and Aggregation Properties

Parera

Comelles²,

Barnadas

et al. 2009

Langmuir

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We have prepared the first platinum(II) metallosurfactants from a new family of linear surfactant phosphines Ph(2)P(CH(2))(n)SO(3)Na {1 (n = 2), 2 (n = 6), and 3 (n = 10)}, which were synthesized by reaction between the halosulfonates X(CH(2))(n)SO(3)Na and sodium diphenylphosphide. The metallosurfactants cis-[PtCl(2)L(2)] (L = 1-3) were obtained after reaction between the phosphines and PtCl(2) in dimethylsulfoxide. All compounds were fully characterized by the usual methods {NMR ((1)H, (13)C, (31)P, (195)Pt), IR, MS-ESI and HRMS}. By exploring the surfactant properties of phosphines 1-3 and their respective platinum metallosurfactants cis-[PtCl(2)L(2)] (L = 1-3) through surface tension measurements, dynamic light scattering spectroscopy, and cryo-TEM microscopy, we were able to analyze the influence of the metal coordination on the critical micelle concentration (cmc) and the aggregation properties. The cmc values of platinum metallosurfactants were considerably lower than those obtained for the free phosphines 1-3. This behavior could be understood by an analogy between the structure of cis-[PtCl(2)L(2)] complexes and bolaform surfactants. The calculated values of area per molecule also showed different tendencies between 1-3 and cis-[PtCl(2)L(2)] complexes, which could be explained on the basis of the possible conformations of these compounds in the air-water interface. The study of aggregates by dynamic light scattering spectroscopy and cryo-TEM microscopy showed the formation of spherical disperse medium size vesicles in all cases. However, substantial differences were observed between the three free phosphines (the population of micellar aggregates increased with long chain length) and also between phosphines and their respective metallosurfactants.

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“…Nevertheless, studies on the relationship between structure and the physicochemical properties of these metalloaggregates remain limited − and deal exclusively with spherical micelles. In addition, these aggregates have been studied mainly in aqueous solutions, while there are only few known metallosurfactants that aggregate in organic solvents, and if so, they are only polar organic solvents such as methanol …”

mentioning

confidence: 99%

Ru(II)-Based Metallosurfactant Forming Inverted Aggregates

et al. 2005

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Knowing the advantages of incorporating a transition metal into interfaces, we report on the first inverted aggregates formed using metallosurfactants. The metallosurfactant possesses four long linear tails that account for the shielding of the polar headgroup in apolar solvents. The nature of the so-formed aggregates changes dramatically from inverted vesicles (toluene) to inverted micelles (hexane). The size of the aggregates was determined using dynamic light scattering. Atomic force microscopy allowed us to study the dry structure of the vesicles on a glass surface.

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Derivatives of Bis(2,2′-bipyridyl)dicyanoiron(II) with Long Alkyl Chains − Versatile Solvatochromic Probes that Form Metalloaggregates in Water-Rich Media

Cited by 18 publications

References 12 publications

14 Iron, cobalt and nickel

14 Iron, cobalt and nickel

New Surfactant Phosphine Ligands and Platinum(II) Metallosurfactants. Influence of Metal Coordination on the Critical Micelle Concentration and Aggregation Properties

Ru(II)-Based Metallosurfactant Forming Inverted Aggregates

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