DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jun, Taehong | ko |
dc.contributor.author | Ha, Yonghwang | ko |
dc.contributor.author | Kang, Jina | ko |
dc.contributor.author | Khatua, Snehadrinarayan | ko |
dc.contributor.author | Churchill, David G | ko |
dc.date.accessioned | 2013-03-09T02:30:48Z | - |
dc.date.available | 2013-03-09T02:30:48Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2010-07 | - |
dc.identifier.citation | NEW JOURNAL OF CHEMISTRY, v.34, no.10, pp.2197 - 2204 | - |
dc.identifier.issn | 1144-0546 | - |
dc.identifier.uri | http://hdl.handle.net/10203/95131 | - |
dc.description.abstract | Herein, we have explored expeditious and lowered expense SiO2-loading in the context of fluorescent "off-on" and "on-off" Zn2+ ion detection/controlled release. A simple racemic ligand (H(2)rlys) (1) prepared in situ can be mechanically SiO2-loaded so as to induce surface sites that allow for "off-on" aqueous fluorescence (lambda(em,max) = similar to 450 nm) detection of Zn2+; with Cu2+ as a competing input, "inhibit'' logic gate behaviour is present. Oppositely, dimeric, chiral fluorescent zinc complexes (Phi(F) = similar to 0.20) prepared in a "one pot'' method, and bearing different Zn center dot center dot center dot Zn internuclear spacings, can be incorporated into silica by two methods. Specifically, the chiral Zn-2(slysH)(2)Cl-2 (2) and racemic Zn-2(rslysH)(2)(mu-OAc)(2) species (3) [slys or rslys = 6-amino-2{(2-hydroxybenzylidene) amino}hexanoate] were mechanochemically loaded. An adsorption constant was 1.99 x 10(-4) (molecules of 2/units SiO2)(min)(-1) for times of 5-20 min, as determined by extensive SEM-EDS data. These confirmed the highly selective "on-off" rapid aqueous fluorescent Cu2+ detection (versus, Li+, Na+, Cs+, Mg2+, Ca2+, Mn2+, Fe2+, Co2+, Ni2+, Ag+, Cd2+, Hg2+, Pb2+) through direct Zn2+ displacement under bulk neat water flow (pH = 7.4) as verified by an authentic sample of [Cu-2(slysH)(2)(NO3)(2)]-silica (4-silica). With the use of 2 center dot SiO2, Na(4)EDTA and Cu2+ "inhibit" logic gate behaviour was also found. Sol-gel techniques allowed for loadings of 2 (20-890 mg) up to 1 : 1 (by wt). The preparation of these inorganic hybrids are extremely inexpensive and rapid to prepare from commercial starting materials and can be extended to variegated forms of SiO2; alumina gel was also functionalized with 2. Cu2+ and Zn2+ are metals pertinent to human neurological health promotion and in neurodegenerative diseases. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | NANOPARTICLES | - |
dc.subject | PROTEIN | - |
dc.subject | IONS | - |
dc.subject | ZINC | - |
dc.subject | BRAIN | - |
dc.subject | CU2+ | - |
dc.subject | NANOMATERIALS | - |
dc.subject | DELIVERY | - |
dc.subject | SYSTEMS | - |
dc.subject | SPHERES | - |
dc.title | Mechanochemical versus sol-gel silica loading of phenolate- and acetate-bridged dizinc complexes: toward instant and inexpensive hybrids for controlled binding and release of Zn(2+) in pure water | - |
dc.type | Article | - |
dc.identifier.wosid | 000282219600020 | - |
dc.identifier.scopusid | 2-s2.0-77957809550 | - |
dc.type.rims | ART | - |
dc.citation.volume | 34 | - |
dc.citation.issue | 10 | - |
dc.citation.beginningpage | 2197 | - |
dc.citation.endingpage | 2204 | - |
dc.citation.publicationname | NEW JOURNAL OF CHEMISTRY | - |
dc.identifier.doi | 10.1039/c0nj00381f | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Churchill, David G | - |
dc.contributor.nonIdAuthor | Khatua, Snehadrinarayan | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | PROTEIN | - |
dc.subject.keywordPlus | IONS | - |
dc.subject.keywordPlus | ZINC | - |
dc.subject.keywordPlus | BRAIN | - |
dc.subject.keywordPlus | CU2+ | - |
dc.subject.keywordPlus | NANOMATERIALS | - |
dc.subject.keywordPlus | DELIVERY | - |
dc.subject.keywordPlus | SYSTEMS | - |
dc.subject.keywordPlus | SPHERES | - |
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