Two Preparation Methods-dominated Cd^Ⅱ-Based Coordination Polymers with Mixed Adenine Nucleobase and 5-Nitroisophathalate Ligands: Synthesis, Structure and Fluorescence

【摘要】 Two new CdⅡ-based coordination polymers（CPs） with mixed adenine（Hade） nucleobase and 5-nitroisophathalate（nip） ligands, {[Cd（Hade）_0.5（H₂O）₂（nip）]·H₂O}n 1 and {[Cd（Hade）（H₂O）_1.25（CH₃OH）0.75（nip）]·0.75 CH₃OH·0.5H₂ O}_n 2, were successfully obtained by varying the preparation methods and structurally characterized. Crystal data for 1: monoclinic, C2/c space group with a = 10.5546（6）, b = 17.3496（6）, c = 16.1198（9） ?, β = 104.2800（10）o, V = 2860.6（2） ?3, Dc = 2.058 g/cm³, Mr = 443.13, Z = 8, F（000） = 1752, μ = 1.585 mm^–1, the final R = 0.0394 and wR = 0.1109 for 2285 observed reflections with I > 2σ（I）. For 2: triclinic, P1 space group with a = 10.2032（7）, b = 10.5098（8）, c = 11.0223（8） ?, a = 65.7050（10）o, β = 74.5750（10）o, g = 61.5280（10）o, V = 943.38（12） ?³, Dc = 1.888 g/cm3, Mr = 536.24, Z = 2, F（000） = 537, μ = 1.225 mm^–1, the final R = 0.0225 and wR = 0.0702 for 3143 observed reflections with I > 2σ（I）. 1 presents a crisscrossed layer with mutually orthogonal {Cd（nip）} chains aggregated by neutral m-N（7）,N（9）-Hade connector. By contrast, 2 displays a linear chain with CdⅡ ions extended by bis-bidentate chelating-nip2–connectors, which are further assembled into a broad ribbon by N-H···N hydrogen-bonding interactions. Additionally, the two solid-state samples with comparable thermal stability exhibit favorable luminescent emissions at room temperature, suggesting their potential applications as fluorescence materials.更多还原

【Abstract】 Two new CdⅡ-based coordination polymers（CPs） with mixed adenine（Hade） nucleobase and 5-nitroisophathalate（nip） ligands, {[Cd（Hade）_0.5（H₂O）₂（nip）]·H₂O}n 1 and {[Cd（Hade）（H₂O）_1.25（CH₃OH）0.75（nip）]·0.75 CH₃OH·0.5H₂ O}_n 2, were successfully obtained by varying the preparation methods and structurally characterized. Crystal data for 1: monoclinic, C2/c space group with a = 10.5546（6）, b = 17.3496（6）, c = 16.1198（9） ?, β = 104.2800（10）o, V = 2860.6（2） ?3, Dc = 2.058 g/cm³, Mr = 443.13, Z = 8, F（000） = 1752, μ = 1.585 mm^–1, the final R = 0.0394 and wR = 0.1109 for 2285 observed reflections with I > 2σ（I）. For 2: triclinic, P1 space group with a = 10.2032（7）, b = 10.5098（8）, c = 11.0223（8） ?, a = 65.7050（10）o, β = 74.5750（10）o, g = 61.5280（10）o, V = 943.38（12） ?³, Dc = 1.888 g/cm3, Mr = 536.24, Z = 2, F（000） = 537, μ = 1.225 mm^–1, the final R = 0.0225 and wR = 0.0702 for 3143 observed reflections with I > 2σ（I）. 1 presents a crisscrossed layer with mutually orthogonal {Cd（nip）} chains aggregated by neutral m-N（7）,N（9）-Hade connector. By contrast, 2 displays a linear chain with CdⅡ ions extended by bis-bidentate chelating-nip2–connectors, which are further assembled into a broad ribbon by N-H···N hydrogen-bonding interactions. Additionally, the two solid-state samples with comparable thermal stability exhibit favorable luminescent emissions at room temperature, suggesting their potential applications as fluorescence materials.更多还原