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Volumn 22, Issue 22, 2006, Pages 9357-9367

A test of the transition-metal nanocluster formation and stabilization ability of the most common polymeric stabilizer, poly(vinylpyrrolidone), as well as four other polymeric protectants

Author keywords

[No Author keywords available]

Indexed keywords

COORDINATING ANIONS; CYCLOHEXENE HYDROGENATION; NANOCLUSTER STABILIZATION; POLYMERIC PROTECTANTS;

EID: 33751403457     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la060934m     Document Type: Article
Times cited : (43)

References (101)
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    • (q) A superb series of papers, complete with a record of the insightful comments by the experts attending the conference, is available in Faraday Discuss. 1991, 92, 1-300.
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  • 21
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    • Ugo, R., Ed.; Kluwer: Dordrecht, The Netherlands, Chapter 1
    • (r) Schmid, G. In Aspects of Homogeneous Catalysis; Ugo, R., Ed.; Kluwer: Dordrecht, The Netherlands, 1990; Chapter 1.
    • (1990) Aspects of Homogeneous Catalysis
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    • Lead references to the extensive literature of PVP stabilization of colloids und nanoclusters: (a) El-Sayed, M. A.; Narayanan, R. J. Phys. Chem. B 2004, 108, 8572-8580.
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    • note
    • For definitions of modem nanoclusters vs classical colloids, including the distinctions between them, see ref le.
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    • Transition-metal nanocluster stabilization: A critical review of ranking methods and putative stabilizers
    • in press
    • Ott, L. S.; Finke, R. G. Transition-Metal Nanocluster Stabilization: A Critical Review of Ranking Methods and Putative Stabilizers. Coord. Chem. Rev., in press (part 5 in the series of nanocluster formation and stabilization fundamental studies).
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    • note
    • 7c was used as a rough estimate of the ability of a given agent to stabilize an aqueous gold colloid against aggregation or flocculation by a NaCl solution. Note that both these classical tests are only for Au colloids, and then only in aqueous solution.
  • 50
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    • (b) The gold number is defined as the mass (mg) of the protecting agent which is just insufficient to prevent 10 mL of a red sol from changing to violet upon the addition of 1 mL of a 10% aqueous NaCl solution: Zsigmondy, R. Z. Anal. Chem. 1968, 40, 697.
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    • 62 as the Ir source. See ref 10 and references therein.
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    • - plus high dielectric constant solvents
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    • - Plus High Dielectric Constant Solvents. Inorg. Chem. 2006, in press (part 7 in the series of nanocluster formation and stabilization fundamental studies).
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    • Ott, L.S.1    Finke, R.G.2
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    • note
    • We also attempted to study polystyrene-b-poly(4-vinylpyridine) block copolymers (generously supplied by Dr. M. Antonietti) as well as commercial poly(propylenimine) and poly(amidoamine) dendrimers as part of this study. However, these three protectants are all insoluble in both acetone and propylene carbonate and, hence, could not be examined as part of this work.
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    • 2] and 1 equiv of Proton Sponge; no hydrogen uptake was observed after 20 h in an attempted hydrogenation reaction. The ionic copolymer preparation appears in Mu, X.-d.; Meng, J.-q.; Li, Z.-C.; Kou, Y. J. Am. Chem. Soc. 2005, 127, 9694.
    • (2005) J. Am. Chem. Soc. , vol.127 , pp. 9694
    • Mu, X.-D.1    Meng, J.-Q.2    Li, Z.-C.3    Kou, Y.4
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    • note
    • (40 A first caveat here, one pointed out by our polymer chemistry colleague Prof. Eugene Chen, is that there are likely broad distributions for each of the three average MW PVP polymers used, so that until narrower distributions are studied, it is impossible to know for sure if a small-MW component is really promoting the nucleation step. A second caveat is that the end-chain groups contribute significantly more to the properties of low MW polymers as high MW polymers: that is. end-chain-group contributions to the nucleation step when low MW PVP is present are also possible.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.