A novel type of metal-containing polyimides based on tricarbonylrhenium(I) diimine complexes

Lam, Lillian Sze Man; Chan, Suk Hang; Chan, Wai Kin

doi:10.1002/1521-3927(20001001)21:15<1081::aid-marc1081>3.0.co;2-j

Cited by 13 publications

(7 citation statements)

References 19 publications

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“…These complexes are known to exhibit long‐lived excited states with metal‐to‐ligand charge transfer (MLCT) character 6, 7. These metal‐containing polymers exhibit interesting photosensitizing properties because of the presence of the rhenium metal complexes 8–11…”

Section: Introductionmentioning

confidence: 99%

Roles of rhenium diimine complexes as metal‐ion probes and photosensitizers in functional polyurethanes

Hui

Lam

Yin

et al. 2003

J. Polym. Sci. A Polym. Chem.

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Polyurethanes incorporated with rhenium diimine complexes were synthesized. The polymers exhibited interesting morphologies and solution properties. Results from gel permeation chromatography suggested the formation of polymer aggregates in solutions. The polymers could act as probes for metal ions. The addition of metal ions to polymer solutions led to significant changes in the electronic absorption properties of the polymer solutions. This was attributed to the interactions between the polyether moieties and metal ions. The metal complexes could also act as efficient photosensitizers. After doping with charge‐transport viologens, the photoconductivity of the polymers was greatly enhanced. The experimental quantum efficiency was simulated with Onsager's theory. The thermalization distances and the primary yields were typically 12–14 Å and 10−3, respectively. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 1708–1715, 2003

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Section: Introductionmentioning

confidence: 99%

Roles of rhenium diimine complexes as metal‐ion probes and photosensitizers in functional polyurethanes

Hui

Lam

Yin

et al. 2003

J. Polym. Sci. A Polym. Chem.

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“…In the past few years, we have been continuously developing different series of metal‐containing polymers for a variety of applications. Most of the polymers are composed of polypyridine complexes of ruthenium or rhenium on the main chain or pendant chain,1–7 and they show interesting photosensitizing properties. Metal complexes incorporated into polymers are able to serve as photosensitizers, light emitters, charge‐transport units,or sensors 8–13.…”

Section: Introductionmentioning

confidence: 99%

“…These complexes are potential candidates for various applications such as luminophores, photooxidants, photocatalysts,48–51 and photosensitizers 52, 53. Recently, we studied the photoconductivity of a series of molecular54 and macromolecular metal complexes55 with Re(CO) 3 (DAB)Cl complexes (DAB = 1,4‐diaza‐1,3‐butadiene). The photosensitivity of the resulting materials was strongly enhanced by the rhenium complexes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of random and block copolymers with pendant rhenium diimine complexes by controlled radical polymerization

Tse

Lam

Man

et al. 2005

J. Polym. Sci. A Polym. Chem.

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We report the polymerization of rhenium-containing methacrylates by atom transfer radical polymerization. The structure of the monomer was confirmed by X-ray crystallography, which showed the bulkiness of the metal-complex moiety. The rhenium complexes were polymerized in the presence of copper(I) bromide, 1,1,4,7,7-pentamethyldiethylenetriamine, and methyl 2-bromopropionate. They were copolymerized with methyl methacrylate in different monomer ratios. An ABA triblock copolymer was also synthesized with poly(methyl methacrylate) as the macroinitiator. When 2,2Ј-bipyridine was used as the ligand for the copper catalyst in the polymerizations, it underwent a ligand exchange process with the iminopyridine ligand in the monomer. The neutral rhenium complex in the homopolymers and copolymers could be converted into ionic forms by the replacement of the chloride with an imidazole ligand, and the solubility of the resulting ionic polymers was greatly enhanced. The photosensitizing properties of the doped and undoped polymer films were investigated by the measurement of the photocurrent response under an externally applied electric field. The photoconductivities of the polymers were approximately 10 Ϫ12 -10 Ϫ13 ⍀ Ϫ1 cm Ϫ1 . The experimental quantum efficiencies were simulated with Onsager's theory, and they showed that the initial quantum yield and thermalization distance were 10 Ϫ3 and 1.7 nm, respectively. Transmission electron microscopy showed that the rhenium complexes aggregated to form domains with dimensions of approximately 20 -30 nm.

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“…1,4-Diaza-1,3-butadiene (DAB) was chosen as the ligand because complexes with this ligand can act as efficient photosensitizers. 15,16 They possess a long-lived excited state with metal-to-ligand charge-transfer character. 17 As a result, long-lived excitons are generated upon photoexcitation, which may lead to a more efficient charge generation and separation processes.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we report the synthesis of a series of polystyrene (PS) or poly(methyl methacrylate) (PMMA) derivatives using various types of metalloinitiators based on rhenium or ruthenium diimine complexes. 1,4-Diaza-1,3-butadiene (DAB) was chosen as the ligand because complexes with this ligand can act as efficient photosensitizers. , They possess a long-lived excited state with metal-to-ligand charge-transfer character …”

Section: Introductionmentioning

confidence: 99%

Photosensitivity of Functional Polystyrene and Poly(methyl methacrylate) Synthesized by Controlled Radical Polymerization

et al. 2003

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We report the synthesis and photosensitizing properties of various polystyrene and poly-(methyl methacrylate) that contain metal complex cores. The polymers were synthesized by atom transfer radical polymerization (ATRP) using metalloinitiators based on rhenium and ruthenium diimine complexes. The detailed structures of the initiators were determined by X-ray crystallography. In ATRP, the catalyst systems were composed of copper(I) bromide and 1,1,4,7,7-pentamethyldiethylenetriamine. The rates of polymerization depended on several factors such as the amounts of initiator, copper bromide, and ligand with respect to the monomer concentration. From the kinetic plots, the polymerizations showed first-order kinetics with respect to the monomer concentration, and the typical rate of polymerization is on the order of 10 -5 s -1 . The photoconducting properties of the polymers were studied using argon-ion laser (488 nm) as the light source. The metal complex cores may serve as efficient photosensitizers in the visible region, and the photoconductivities of the polymers are on the order of 10 -10 Ω -1 cm -1 . The experimental quantum yields were fitted into Onsager's equation, from which the primary yield and thermalization distance were calculated to be 0.02 and 1.3 to 1.8 nm, respectively.

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A novel type of metal-containing polyimides based on tricarbonylrhenium(I) diimine complexes

Cited by 13 publications

References 19 publications

Roles of rhenium diimine complexes as metal‐ion probes and photosensitizers in functional polyurethanes

Roles of rhenium diimine complexes as metal‐ion probes and photosensitizers in functional polyurethanes

Synthesis and characterization of random and block copolymers with pendant rhenium diimine complexes by controlled radical polymerization

Photosensitivity of Functional Polystyrene and Poly(methyl methacrylate) Synthesized by Controlled Radical Polymerization

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