Dynamics of Intercalation/De-Intercalation of Rhodamine B during the Polymorphic Transformation of CdAl Layered Double Hydroxide to the Brucite-Like Cadmium Hydroxide

Handle URI:
http://hdl.handle.net/10754/614886
Title:
Dynamics of Intercalation/De-Intercalation of Rhodamine B during the Polymorphic Transformation of CdAl Layered Double Hydroxide to the Brucite-Like Cadmium Hydroxide
Authors:
Saliba, Daniel; Ezzeddine, Alaa ( 0000-0002-0983-8956 ) ; Emwas, Abdul-Hamid M.; Khashab, Niveen M. ( 0000-0003-2728-0666 ) ; Al-Ghoul, Mazen
Abstract:
Cadmium-Aluminum layered double hydroxide (CdAl LDH) is thermodynamically unstable and transforms to Cd(OH)2 and Al(OH)3 in a short period of time. We present a reaction-diffusion framework that enables us to use in situ steady-state fluorescence spectroscopy to study the kinetics of intercalation of a fluorescent probe (Rhodamine B (RhB)) during the formation of the CdAl LDH and its de-intercalation upon the conversion of the LDH phase to the β phase (Cd(OH)2). The method involves the diffusion of sodium hydroxide into a hydrogel gel matrix containing the aluminum and cadmium ions as well as the species we wish to incorporate in the interlayers of the LDH. The existence of RhB between the LDH layers and its expel during the transition into the β phase are proved via fluorescence microscopy, XRD and ssNMR. The activation energies of intercalation and de-intercalation of RhB are computed and show dependence on the cationic ratio of the corresponding LDH. We find that the energies of de- intercalation are systematically higher than those of intercalation proving that the dyes are stabilized due to the probe-brucite sheets interactions.
KAUST Department:
Smart Hybrid Materials (SHMs) lab; Imaging and Characterization Core Lab
Citation:
Dynamics of Intercalation/De-Intercalation of Rhodamine B during the Polymorphic Transformation of CdAl Layered Double Hydroxide to the Brucite-Like Cadmium Hydroxide 2016 Crystal Growth & Design
Publisher:
American Chemical Society (ACS)
Journal:
Crystal Growth & Design
Issue Date:
23-Jun-2016
DOI:
10.1021/acs.cgd.6b00455
Type:
Article
ISSN:
1528-7483; 1528-7505
Sponsors:
DS and MG gratefully acknowledge the funding provided by the American University of Beirut Research Board and by the Lebanese National Council for Scientific Research (LCNSR).
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acs.cgd.6b00455
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorSaliba, Danielen
dc.contributor.authorEzzeddine, Alaaen
dc.contributor.authorEmwas, Abdul-Hamid M.en
dc.contributor.authorKhashab, Niveen M.en
dc.contributor.authorAl-Ghoul, Mazenen
dc.date.accessioned2016-06-28T11:24:44Z-
dc.date.available2016-06-28T11:24:44Z-
dc.date.issued2016-06-23-
dc.identifier.citationDynamics of Intercalation/De-Intercalation of Rhodamine B during the Polymorphic Transformation of CdAl Layered Double Hydroxide to the Brucite-Like Cadmium Hydroxide 2016 Crystal Growth & Designen
dc.identifier.issn1528-7483-
dc.identifier.issn1528-7505-
dc.identifier.doi10.1021/acs.cgd.6b00455-
dc.identifier.urihttp://hdl.handle.net/10754/614886-
dc.description.abstractCadmium-Aluminum layered double hydroxide (CdAl LDH) is thermodynamically unstable and transforms to Cd(OH)2 and Al(OH)3 in a short period of time. We present a reaction-diffusion framework that enables us to use in situ steady-state fluorescence spectroscopy to study the kinetics of intercalation of a fluorescent probe (Rhodamine B (RhB)) during the formation of the CdAl LDH and its de-intercalation upon the conversion of the LDH phase to the β phase (Cd(OH)2). The method involves the diffusion of sodium hydroxide into a hydrogel gel matrix containing the aluminum and cadmium ions as well as the species we wish to incorporate in the interlayers of the LDH. The existence of RhB between the LDH layers and its expel during the transition into the β phase are proved via fluorescence microscopy, XRD and ssNMR. The activation energies of intercalation and de-intercalation of RhB are computed and show dependence on the cationic ratio of the corresponding LDH. We find that the energies of de- intercalation are systematically higher than those of intercalation proving that the dyes are stabilized due to the probe-brucite sheets interactions.en
dc.description.sponsorshipDS and MG gratefully acknowledge the funding provided by the American University of Beirut Research Board and by the Lebanese National Council for Scientific Research (LCNSR).en
dc.language.isoenen
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.cgd.6b00455en
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Crystal Growth & Design, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.cgd.6b00455.en
dc.titleDynamics of Intercalation/De-Intercalation of Rhodamine B during the Polymorphic Transformation of CdAl Layered Double Hydroxide to the Brucite-Like Cadmium Hydroxideen
dc.typeArticleen
dc.contributor.departmentSmart Hybrid Materials (SHMs) laben
dc.contributor.departmentImaging and Characterization Core Laben
dc.identifier.journalCrystal Growth & Designen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Chemistry, American University of Beirut, P.O.Box 11-0236, Riad El- Solh 1107 2020, Beirut, Lebanonen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorEzzeddine, Alaaen
kaust.authorEmwas, Abdul-Hamid M.en
kaust.authorKhashab, Niveen M.en
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