Rare earth 3-(4′-hydroxyphenyl)propionate complexes Deacon, Glen B., Junk, Peter C., Lee, Winnie W., Forsyth, Maria and Wang, Jun 2015, Rare earth 3-(4′-hydroxyphenyl)propionate complexes, New journal of chemistry, vol. 39, no. 10, pp. 7688-7695, doi: 10.1039/c5nj00787a. Attached Files Name Description MIMEType Size Downloads Title Rare earth 3-(4′-hydroxyphenyl)propionate complexes Author(s) Deacon, Glen B. Junk, Peter C. Lee, Winnie W. Forsyth, Maria orcid.org/0000-0002-4273-8105 Wang, Jun Journal name New journal of chemistry Volume number 39 Issue number 10 Start page 7688 End page 7695 Total pages 8 Publisher Royal Society of Chemistry Place of publication Cambridge, Eng. Publication date 2015 ISSN 1144-0546 1369-9261 Keyword(s) Science & Technology Physical Sciences Chemistry, Multidisciplinary Chemistry METAL COORDINATION POLYMERS CRYSTAL-STRUCTURES CORROSION-INHIBITORS X-RAY CINNAMATE LANTHANUM STEEL CHROMIUM CHROMATE COATINGS Summary The reaction of lanthanoid chlorides or nitrates with sodium 3-(4′-hydroxyphenyl)propionate (Na4hpp) in methanol or water has yielded complexes [La4(4hpp)12(H2O)6]·4H2O·MeOH (1), [Ce2(4hpp)6(H2O)3]·(H2O)·2.5(EtOH) (2a) (after crystallization from ethanol), [Ho(4hpp)3(H2O)2] (5), [Er(4hpp)3(H2O)2]·1.5(H2O) (6), and [Lu(4hpp)3]·H2O crystal composition (7), as well as heterobimetallics [NaCe2(4hpp)7(H2O)2]·3(H2O) (2b), [NaPr2(4hpp)7(H2O)2]·3(H2O) (3), and [NaNd2(4hpp)7(H2O)(MeOH)]·(H2O)·3(MeOH) (4). The structures of homometallic complexes 1, 2a, 6, and 7 reveal one-dimensional coordination polymers and vividly illustrate the effect of lanthanoid contraction with a decline in coordination numbers in the series from 9-11 (1), 9,10 (2a), 8 (6) to 7 (7) through variations in carboxylate coordination and ligation of water. Bimetallic complexes 2a and 4 each exhibit five different carboxylate binding modes as well as coordination of the 4-OH substituent of 4hpp to sodium thereby linking 1D polymer chains into a 2D network with both 9 and 10 coordinate Ln atoms and 6 coordinate sodium. Bulk products after drying lose solvent of crystallization in some cases (2a, 6), or exchange MeOH for water (4). X-ray powder diffraction indicates that bulk 2b and 3 are isotypic, as are bulk 5 and 6. In contrast to the excellent corrosion protection of lanthanum 4-hydroxycinnamate, compound 1 is ineffective in preventing the corrosion of mild steel, thereby establishing the importance of the -CHCH- structural unit of the former in its anti-corrosion properties. However the flexible -CH2-CH2- chain of the 4hpp ligand enables the crystal engineering of its lanthanoid complexes in a wide variety of structures as well as effective crystallization for structure determination, whereas the analogous 4-hydroxycinnamates have so far evaded structural characterization except for Ln = La, Ce owing to crystallization problems. Language eng DOI 10.1039/c5nj00787a Field of Research 030306 Synthesis of Materials 030604 Electrochemistry 03 Chemical Sciences Socio Economic Objective 870302 Metals (e.g. Composites HERDC Research category C1 Refereed article in a scholarly journal ERA Research output type C Journal article Copyright notice ©2015, Royal Society of Chemistry Persistent URL http://hdl.handle.net/10536/DRO/DU:30081429 Document type: Journal Article Collection: Institute for Frontier Materials Related Links Link Description Connect to published version Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Wed, 17 Feb 2016, 09:27:34 EST Thu, 18 Feb 2016, 04:00:45 EST Thu, 18 Feb 2016, 05:09:42 EST Tue, 19 Apr 2016, 11:55:04 EST Tue, 19 Apr 2016, 11:56:05 EST Filtered Full Citation counts:   Cited 6 times in TR Web of Science Cited 7 times in Scopus Search Google Scholar Access Statistics: 179 Abstract Views, 2 File Downloads  -  Detailed Statistics Created: Wed, 17 Feb 2016, 09:27:34 EST

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