Amine‐Responsive Adaptable Nanospaces: Fluorescent Porous Coordination Polymer for Molecular Recognition1. (11th September 2014)

• Record Type: Journal Article
• Authors: Haldar, Ritesh; Matsuda, Ryotaro; Kitagawa, Susumu; George, Subi J.; Maji, Tapas Kumar
• Is Part Of: Angewandte Chemie. Volume 126:Number 44(2014)
• Page Start: 11966
• Page End: 11971
• Publication Date: 2014-09-11
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201405619
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Flexible and dynamic porous coordination polymers (PCPs) with well‐defined nanospaces composed of chromophoric organic linkers provide a scaffold for encapsulation of versatile guest molecules through noncovalent interactions. PCPs thus provide a potential platform for molecular recognition. Herein, we report a flexible 3D supramolecular framework {[Zn(ndc)(<italic>o</italic>‐phen)]⋅DMF}_{<italic>n</italic>} (<italic>o</italic>‐phen=1, 10‐phenanthroline, ndc=2, 6‐napthalenedicarboxylate) with confined nanospaces that can accommodate different electron‐donating aromatic amine guests with selective turn‐on emission signaling. This system serves as a molecular recognition platform through an emission‐readout process. Such unprecedented tunable emission with different amines is attributed to its emissive charge‐transfer (CT) complexation with <italic>o</italic>‐phen linkers. In certain cases this CT emission is further amplified by energy transfer from the chromophoric linker unit ndc, as evidenced by single‐crystal X‐ray structural characterization.</p> </abstract>