在水熱條件下,利用硝酸鈷,雙吡啶橋接有機配子NI-bipy-44與芳香二酸化合物反應,得到四種鈷金屬配位聚合物:[{Co3(bpdc)3(NI-bipy-44)(DMF)}{Co3(bpdc)3(NI-bipy-44)(H2O)}] (1),[Co2(bpdc)2(NI-bipy-44)] (2)、 [Co2(1,4-bdc-Br)2(NI-bipy-44)2] (3)和[Co2(1,4-bdc-NO2)2(NI-bipy-44)2] (4)。化合物1具有三維二次互穿的層柱狀結構,孔隙佔有率為43.2%;化合物2具有三維二次互穿的層柱狀結構,孔隙佔有率為62.3%;化合物3、4具有三維的層柱狀結構,孔隙佔有率分別為56.1%及49.9%。 我們透過化合物2、3其孔洞性進行CO2的吸附檢測。化合物2表現出對CO2的吸附能力。化合物3對CO2的吸附能力不佳。 我們也將化合物1-4浸泡在染料水溶液中,利用可見光紫外光光譜檢測化合物1-4對於染料的吸附能力。所使用之有機染料有甲基橙、亞甲藍、甲基藍、孔雀石綠、酸性橙7、羅丹明B和甲基紅。實驗結果顯示四種有機金屬框架與有機染料間有不同的吸附能力。化合物1和化合物2對甲基橙、亞甲藍、甲基藍、孔雀石綠、酸性橙7、羅丹明B有吸附能力;化合物3和化合物4對甲基橙、亞甲藍、甲基藍、酸性橙7、羅丹明B和甲基紅有吸附能力。根據染料的吸附,我們進一步分析其動力學吸附機制。
Through solvothermal reactions, four cobalt–organic frameworks, [{Co3(bpdc)3(NI-bipy-44)(DMF)}{Co3(bpdc)3(NI-bipy-44)(H2O)}] (1), [Co2(bpdc)2(NI-bipy-44)] (2), [Co2(1,4-bdc-Br)2(NI-bipy-44)2] (3), and [Co2(1,4-bdc-NO2)2(NI-bipy-44)2] (4) were constructed from Co(NO3)2∙3H2O, N-(pyridin-4-yl)-4-(pyridin-4-yl)-1,8-naphthalimide (NI-bipy-44), and aromatic dicarboxylic acids (biphenyl-4,4′-dicarboxylic acid, H2bpdc; 2-bromoterephthalic acid, 1,4-H2bdc-Br; nitroterephthalic acid, 1,4-H2bdc-NO2). Compounds 1 and 2 have a two-fold interpenetrated 3D pillared-layer structure with 43.2 and 62.3% porosities, respectively; compounds 3 and 4 have similar structure suiting a 3D non-interpenetrated pillared-layer structure with 56.1% and 49.9% porosities, respectively. Compound 2 showed gas adsorption ability for CO2, while compound 3 does not.Furthermore, dye adsorption studies showed that compounds 1 and 2 can adsorb methyl orange (MO), methylene blue (MB), methyl blue, malachite green chloride (MG), acid orange 7 (AO7) and rhodamine B (RhB), while compounds 3 and 4 can adsorb MO, MB, methyl blue, AO7, RhB and MR.