title: Aggregation in amphiphilic macrocycle-substituted Gd(3+) DOTA-type chelates is affected by the regiochemistry of substitution.
abstract: Gd(3+) chelates of macrocyclic bifunctional chelators (BFCs) can differentiate into two regioisomers: corner and side. These isomers afford different orientations of chelate relative to conjugate. These differences alter the self-assembly, tumbling, and effectiveness as magnetic resonance imaging contrast agents of the two biphenyl conjugate isomers.
authors.affiliation: Department of Chemistry, Portland State University , 1719 SW 10th Avenue, Portland, Oregon 97201, United States.
authors.forename: Benjamin C
authors.initials: BC
authors.lastname: Webber
authors.forename: Claudio
authors.initials: C
authors.lastname: Cassino
authors.forename: Mauro
authors.initials: M
authors.lastname: Botta
authors.forename: Mark
authors.initials: M
authors.lastname: Woods
mesh_terms: D002614:Chelating Agents / Q000138:chemical synthesis / Q000737:chemistry*; D003287:Contrast Media / Q000138:chemical synthesis / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D047028:Macrocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D008279:Magnetic Resonance Imaging; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D013237:Stereoisomerism; D013501:Surface-Active Agents / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D002614:Chelating Agents; D003287:Contrast Media; D006571:Heterocyclic Compounds; D047028:Macrocyclic Compounds; D009942:Organometallic Compounds; D013501:Surface-Active Agents; C050823:gadolinium 1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraacetate