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Volumn 102, Issue 24, 1998, Pages 4606-4614

Ab initio investigation of gadolinium complexes with polyamino carboxylate ligands and force fields parametrization of metal-ligand interactions

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EID: 0001066772     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp973271d     Document Type: Article
Times cited : (46)

References (56)
  • 6
    • 85034309780 scopus 로고    scopus 로고
    • note
    • Abbreviated names for the ligands are DOTA = 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate; DOTMA = (1R,4R,7R,10R)-α′,α″,α‴,α′ ‴-tetramethyl-1,4,7.10-tetraazacyclododecane-1,4,7,10-tetraacetate; DO3A = 1,4,7,10-tetraazacyclododecane-1,4,7-triacetate; DO3MA = (1R,4A,7R)-α′,α″,α‴-trimethyl-1, 4,7,10-tetraazacyclododecane-1,4,7-triacetate; DTPA = 1,4,7-triazaheptane-1,1,4,7,7-pentaacetate.
  • 21
    • 0002246864 scopus 로고
    • Molecular Mechanics Force Fields for Modeling Inorganic and Organometallic Compounds
    • Lipkowitz, K. B., Boyd, D. B., Eds.; VCH Publishers Inc.: New York
    • Landis, C. R.; Root, D. M.; Cleveland, T. Molecular Mechanics Force Fields for Modeling Inorganic and Organometallic Compounds, in Reviews in Computational Chemistry; Lipkowitz, K. B., Boyd, D. B., Eds.; VCH Publishers Inc.: New York, 1995; Vol. 6.
    • (1995) Reviews in Computational Chemistry , vol.6
    • Landis, C.R.1    Root, D.M.2    Cleveland, T.3
  • 34
    • 85034305715 scopus 로고    scopus 로고
    • note
    • Calculations were performed on different computational platforms: Cray C90, Convex 3820, IBM RISC/6000 model 7030-3CT. As an example of the required CPU times, data relative to compound 1 are reported: one direct SCF plus gradient calculations, involving 345 (3-21G) or 490 (6-31G*) basis functions, required 1 h (3-21G) or 4 h (6-31G*) on Cray C90. Full geometry optimizations, involving 162 degrees of freedom, required 50 wave function evaluations (3-21G) to converge the gradient threshold (2 CPU days on Cray C90).
  • 52
    • 85034275247 scopus 로고
    • Tripos Associates: 1699 S. Hanley Road, Suite 303, St. Louis, MO 63144
    • SYBYL 6.2; Tripos Associates: 1699 S. Hanley Road, Suite 303, St. Louis, MO 63144, 1992.
    • (1992) SYBYL 6.2
  • 54
    • 85034284134 scopus 로고    scopus 로고
    • note
    • 3 water oxygen); H (hydrogen); H.w (water hydrogen). In all cases, TRIPOS default atomic parameter values are used. The O.w and H.w atom types have been included only for the purpose of distinguishing the water O and H from the ligand O and H: the atomic parameters for O.w and H.w have been set equal to those of O.3 and H, respectively.
  • 55
    • 85034287344 scopus 로고    scopus 로고
    • note
    • As the potential derived charges of atoms with the same MM type presented close values, their average value was considered in MM calculations. Nitrogen atom charges in compounds 3 and 4 were averaged only for those nitrogens that carry the acetate arms.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.