Search

A new type of 2D light-emitting coordination polymer [Cd(H 2 L)(H 2 O) 2 ] n (CP1) (H 4 L=3,5-bis(3,4-dicarboxyphenyl)pyridine) was successfully constructed, which shows stability in a wide range of pH solution. More importantly, this material is a multifunctional luminescence sensing material which can become a good candidate for La3+/Eu3+/Tb3+/Dy3+ ions selective sensing with lower detection limits. A multifunctional light-emitting sensing material, which can selectively detect La3+/Eu3+/Tb3+/Dy3+ ion. [Display omitted] • A 2D undulating coordination polymer Cd-CP was successfully synthesized. • Cd-CP can sensitize rare earth ions. • Cd-CP was used as a fluorescent sensing material for detecting La3+/Eu3+/Tb3+/Dy3+ ions. [ABSTRACT FROM AUTHOR]

A new Gd3+ coordination polymer (CP), namely, poly[diaqua[μ4‐1′‐carboxy‐3,3′‐(diazene‐1,2‐diyl)dibenzene‐1,2,2′‐tricarboxylato]gadolinium(III)], [Gd(C16H7N2O8)(H2O)2]n, (I), has been synthesized hydrothermally from Gd(NO3)3·6H2O and azobenzene‐2,2′,3,3′‐tetracarboxylic acid (H4abtc). The target solid has been characterized by single‐crystal and powder X‐ray diffraction, elemental analysis, IR spectroscopy and susceptibility measurements. CP (I) crystallizes in the monoclinic space group C2/c. The structure features a 4‐connected topology in which Gd3+ ions are connected by carboxylate groups into a linear chain along the monoclinic symmetry direction. Adjacent one‐dimensional aggregates are bridged by Habtc3− ligands to form a two‐dimensional CP in the (10) plane. A very short hydrogen bond [O...O = 2.4393 (4) Å] links neighbouring layers into a three‐dimensional network. A magnetic study revealed antiferromagnetic Gd...Gd coupling within the chain direction. CP (I) displays a significant magnetocaloric effect (MCE), with a maximum −ΔSm of 27.26 J kg−1 K−1 for ΔH = 7 T at 3.0 K. As the MCE in (I) exceeds that of the commercial magnetic refrigerant GGG (Gd3Ga5O12, −ΔSm = 24 J kg−1 K−1, ΔH = 30 kG), CP (I) can be regarded as a potential cryogenic material for low‐temperature magnetic refrigeration. [ABSTRACT FROM AUTHOR]

A novel cadmium coordination polymer, namely, {[Cd(Htcpb)(DMF)(H2O)2]·1.5H2O}n(1) has been hydrothermally synthesized from Cd(NO3)2·4H2O and a flexible triangle ligand of 1,3,5-tris(4-carboxyphenoxy)benzene (H3tcpb). The structure has been determined by single-crystal X-ray diffraction analysis, elemental analysis, IR spectrum, powder X-ray diffraction, and thermanalysis. The structural analysis displays that complex 1 obtained at 120 °C features a 1D chain containing mononuclear cadmium centers. The fluorescence property of complex 1 was examined in the solid-state at room temperature, and upon excitation at 290 nm, it exhibits distinct fluorescence with the maximum emission at 389 nm. [ABSTRACT FROM AUTHOR]

• A novel 1D Cd-coordination polymer is synthesized by solvothermal method. • The CP1 is an excellent luminescence sensor with good water stability, thermal stability and wide pH stability. • The CP1 has strong selectivity for Tb3+, the low detection limit (11.4 nM) and the limit of quantification (37.9 nM). • The CP1 could monitor Tb3+ with the test strips by the naked eyes under the 254 nm UV light. A novel chiral Cd-coordination polymer (CP1) was synthesized by solvothermal reaction with chiral ligand 1,4-bis((L‑serine)methyl)benzene (L-H 2 bsmb) and cadmium oxide, and the structure of CP1 was characterized by single-crystal X-ray diffraction, fourier transform infrared spectoscopy (FT-IR), powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), elemental analysis (EAs), solid circular dichroism (CD) and fluorescence spectroscopy. One dimensional chain for CP1 was constructed to a chiral 3D structure by intermolecular hydrogen bonds between carboxyl group and coordination water molecules and weak interaction of C‒H•••π. In aqueous system, the fluorescence of CP1 shows excellent stability. Through the detection experiments towards 32 different ions, it was found that CP1 has specific selection for Tb(Ⅲ) ions with the fast response time (within 1 min), low detection limit (11.4 nM), strong anti-interference ability and good recyclability. Fluorescent test strips based on CP1 allow to sense Tb(Ⅲ) ion quickly and easily by naked eyes, which provides an excellent method for monitoring Tb(Ⅲ) in human body and water systems. A novel luminescent CP 1 sensor can distinguish Tb3+ quickly and easily by the naked eye. [Display omitted] [ABSTRACT FROM AUTHOR]