title: Amine-responsive adaptable nanospaces: fluorescent porous coordination polymer for molecular recognition.
abstract: 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)(o-phen)]⋅DMF}n (o-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 o-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.
authors.affiliation: New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560064 (India).
authors.forename: Ritesh
authors.initials: R
authors.lastname: Haldar
authors.forename: Ryotaro
authors.initials: R
authors.lastname: Matsuda
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitagawa
authors.forename: Subi J
authors.initials: SJ
authors.lastname: George
authors.forename: Tapas Kumar
authors.initials: TK
authors.lastname: Maji
mesh_terms: D000588:Amines / Q000378:metabolism*; D004735:Energy Transfer / Q000502:physiology*; D014961:X-Ray Diffraction / Q000379:methods*
chemical_list: D000588:Amines
keywords: X-ray diffraction; charge transfer; energy transfer; molecular recognition; supramolecular encapsulation