A New Coordination Polymer Exhibiting Unique 2D Hydrogen‐Bonded (H2O)16 Ring Formation and Water‐Dependent Luminescence Properties
Identifieur interne : 000364 ( Main/Exploration ); précédent : 000363; suivant : 000365A New Coordination Polymer Exhibiting Unique 2D Hydrogen‐Bonded (H2O)16 Ring Formation and Water‐Dependent Luminescence Properties
Auteurs : Wang [Taïwan] ; Ching-Chun Yang ; Wen-Chun Chung ; Lee [Taïwan] ; Ho ; Ya-Chien Yu [Taïwan] ; Min-Wen Chung [Taïwan] ; Sheu [Taïwan] ; Chien-Hung Shih ; Kum-Yi Cheng ; Pei-Jen Chang ; Chou [Taïwan]Source :
- Chemistry – A European Journal [ 0947-6539 ] ; 2011-08-08.
English descriptors
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Abstract
A new coordination polymer, [Zn(dpe)(bdc)]⋅4H2O (ZndB; dpe=1,2‐bis(4‐pyridyl)ethane, bdc2−=dianion of benzenedicarboxylic acid), which possesses a 3D metal–organic framework (MOF) has been synthesized and structurally characterized. This 3D MOF is constructed by the assembly of helical channels filled with guest water molecules in both inner and outer regions of the channel. The resulting network also creates a 2D water layer containing hydrogen‐bonded (H2O)16 rings as the basic building units. Thermogravimetric and powder X‐ray diffraction measurements of ZndB revealed a two‐step weight loss of water molecules with a reversible water adsorption/desorption process in the inner channel for the first stage, and irreversible water desorption in the outer channel for the second stage. This spongelike property is manifested by the excimer emission originating from interaction between dpe (π*) and the other dpe (π) of the proximal helical channel, which is highly sensitive to the environmental perturbation. Powder X‐ray analyses reveal that the dehydration process induces the readjustment of dpe π–π stacking distance/orientation, which results in dramatic luminescence changes from dim pale blue (λem≈470 nm) upon hydration to bright white‐light generation (broad, λem≈500–550 nm) upon water depletion, accompanied by a ≈100‐fold increase in the emission intensity.
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DOI: 10.1002/chem.201100176
Affiliations:
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xml:lang="fr">Taïwan</country><wicri:regionArea>National Synchrotron Radiation Research Center</wicri:regionArea></affiliation></author><author><name sortKey="Shih, Chien Ung" sort="Shih, Chien Ung" uniqKey="Shih C" first="Chien-Hung" last="Shih">Chien-Hung Shih</name><affiliation><wicri:noCountry code="subField">(+886) 2‐2881‐1053</wicri:noCountry></affiliation></author><author><name sortKey="Cheng, Kum I" sort="Cheng, Kum I" uniqKey="Cheng K" first="Kum-Yi" last="Cheng">Kum-Yi Cheng</name><affiliation><wicri:noCountry code="subField">(+886) 2‐2881‐1053</wicri:noCountry></affiliation></author><author><name sortKey="Chang, Pei En" sort="Chang, Pei En" uniqKey="Chang P" first="Pei-Jen" last="Chang">Pei-Jen Chang</name><affiliation><wicri:noCountry code="subField">(+886) 2‐2881‐1053</wicri:noCountry></affiliation></author><author><name sortKey="Chou" sort="Chou" uniqKey="Chou" last="Chou">Chou</name><affiliation wicri:level="1"><country 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Eur. J.</title><idno type="ISSN">0947-6539</idno><idno type="eISSN">1521-3765</idno><imprint><publisher>WILEY‐VCH Verlag</publisher><pubPlace>Weinheim</pubPlace><date type="published" when="2011-08-08">2011-08-08</date><biblScope unit="volume">17</biblScope><biblScope unit="issue">33</biblScope><biblScope unit="page" from="9232">9232</biblScope><biblScope unit="page" to="9241">9241</biblScope></imprint><idno type="ISSN">0947-6539</idno></series><idno type="istex">21E1E9A20E23F84C45D038814FC51CA456377679</idno><idno type="DOI">10.1002/chem.201100176</idno><idno type="ArticleID">CHEM201100176</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0947-6539</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>helical structures</term><term>host–guest systems</term><term>hydrogen bonds</term><term>luminescence</term><term>metal–organic frameworks</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A new coordination polymer, [Zn(dpe)(bdc)]⋅4H2O (ZndB; dpe=1,2‐bis(4‐pyridyl)ethane, bdc2−=dianion of benzenedicarboxylic acid), which possesses a 3D metal–organic framework (MOF) has been synthesized and structurally characterized. This 3D MOF is constructed by the assembly of helical channels filled with guest water molecules in both inner and outer regions of the channel. The resulting network also creates a 2D water layer containing hydrogen‐bonded (H2O)16 rings as the basic building units. Thermogravimetric and powder X‐ray diffraction measurements of ZndB revealed a two‐step weight loss of water molecules with a reversible water adsorption/desorption process in the inner channel for the first stage, and irreversible water desorption in the outer channel for the second stage. This spongelike property is manifested by the excimer emission originating from interaction between dpe (π*) and the other dpe (π) of the proximal helical channel, which is highly sensitive to the environmental perturbation. Powder X‐ray analyses reveal that the dehydration process induces the readjustment of dpe π–π stacking distance/orientation, which results in dramatic luminescence changes from dim pale blue (λem≈470 nm) upon hydration to bright white‐light generation (broad, λem≈500–550 nm) upon water depletion, accompanied by a ≈100‐fold increase in the emission intensity.</div></front></TEI><affiliations><list><country><li>Taïwan</li></country></list><tree><noCountry><name sortKey="Chang, Pei En" sort="Chang, Pei En" uniqKey="Chang P" first="Pei-Jen" last="Chang">Pei-Jen Chang</name><name sortKey="Cheng, Kum I" sort="Cheng, Kum I" uniqKey="Cheng K" first="Kum-Yi" last="Cheng">Kum-Yi Cheng</name><name sortKey="Chung, Wen Hun" sort="Chung, Wen Hun" uniqKey="Chung W" first="Wen-Chun" last="Chung">Wen-Chun Chung</name><name sortKey="Ho" sort="Ho" uniqKey="Ho" last="Ho">Ho</name><name sortKey="Shih, Chien Ung" sort="Shih, Chien Ung" uniqKey="Shih C" first="Chien-Hung" last="Shih">Chien-Hung Shih</name><name sortKey="Yang, Ching Hun" sort="Yang, Ching Hun" uniqKey="Yang C" first="Ching-Chun" last="Yang">Ching-Chun Yang</name></noCountry><country name="Taïwan"><noRegion><name sortKey="Wang" sort="Wang" uniqKey="Wang" last="Wang">Wang</name></noRegion><name sortKey="Chou" sort="Chou" uniqKey="Chou" last="Chou">Chou</name><name sortKey="Chou" sort="Chou" uniqKey="Chou" last="Chou">Chou</name><name sortKey="Chung, Min En" sort="Chung, Min En" uniqKey="Chung M" first="Min-Wen" last="Chung">Min-Wen Chung</name><name sortKey="Lee" sort="Lee" uniqKey="Lee" last="Lee">Lee</name><name sortKey="Sheu" sort="Sheu" uniqKey="Sheu" last="Sheu">Sheu</name><name sortKey="Yu, Ya Hien" sort="Yu, Ya Hien" uniqKey="Yu Y" first="Ya-Chien" last="Yu">Ya-Chien Yu</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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