CN106496530B - 一种多孔有机聚合物骨架材料及其制备方法与应用 - Google Patents
一种多孔有机聚合物骨架材料及其制备方法与应用 Download PDFInfo
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Abstract
本发明的一种多孔有机聚合物骨架材料及其制备方法与应用属于化学及新材料技术领域。以2,7‑二‑(氮‑咔唑基)‑9芴酮为结构基元,通过二甲醇缩甲醛作为交联剂,在路易斯酸催化剂的催化下获得以亚甲基联接的多孔有机聚合物骨架材料,所述的多孔有机聚合物骨架材料可应用于光催化有机胺选择性合成亚胺或光催化硫醚选择性合成亚砜。本发明具有操作简单、反应条件温和、适用性广泛等特点。
Description
技术领域
本发明属于化学及新材料技术领域,具体涉及一种多孔有机聚合物材料及其制备方法和应用。
背景技术
与传统的化石能源相比,光能是一种廉价清洁、无污染的绿色能源。它在自然界中储藏丰富,而且使用起来非常简便,具有很高的潜在应用前景。随着人们对工业生产所造成的环境汚染的关注日益密切,光能的有效利用己成为当今的热点研究课题。
多孔有机聚合物是一类新型的多孔材料,其具有高的比表面积、低的骨架密度以及优秀的化学稳定性等独特的性质,已在气体储存、吸附与分离、多相催化、能量存储、有机光电子等领域表现出潜在的应用。相比于分子筛和金属有机骨架等,多孔有机聚合物的优势在于可以选择具有特定功能的有机结构基元通过多种合成反应途径来制备,进而调节聚合物的孔参数与骨架性质。
到目前为止,以多孔有机聚合物作为非均相有机光催化剂的文献较少,而且一般是通过贵金属催化偶联的方法获得(Macromolecules 2013,46,8779;Chem.Mater.2015,27,1921;J.Mater.Chem.A 2014,2,18720;J.Am.Chem.Soc.2015,137,3265)。不但受限于单体上的反应基团,而且大大增加多孔聚合物的制备成本。因此,利用廉价的方法合成新一类具有高比表面积、良好稳定性和优秀的光催化效率的多孔有机聚合物在非均相有机光催化领域具有重要的意义。
发明内容
本发明的目的在于,针对现有技术的不足,提供一种可用于非均相有机光催化的多孔有机聚合物骨架材料及制备方法与用途。
本发明的目的是通过以下技术方案实现的:
一种多孔有机聚合物骨架材料,是以2,7-二-(氮-咔唑基)-9芴酮为结构基元,通过二甲醇缩甲醛作为交联剂,在路易斯酸催化剂的催化下获得以亚甲基联接的多孔有机聚合物骨架材料。
本发明的一种多孔有机聚合物骨架材料,所述的路易斯酸催化剂优选FeC l3或AlCl3。
一种多孔有机聚合物骨架材料的制备方法,具体步骤为:在惰性气体保护下,将2,7-二-(氮-咔唑基)-9芴酮、二甲醇缩甲醛和路易斯酸催化剂按摩尔比1~4:8:8置于容器中,向其中加入有机溶剂并混合,所述的有机溶剂的用量为每mmol2,7-二-(氮-咔唑基)-9芴酮使用1-100ml,将得到的混合液在30-120℃搅拌6-120小时,待反应结束后,将体系冷却至室温,将反应生成的固体过滤、清洗、真空干燥后得到棕褐色多孔有机聚合物骨架材料。
本发明的一种多孔有机聚合物骨架材料的制备方法中,所述的有机溶剂优选1,2-二氯乙烷或氯仿,用量优选每mmol2,7-二-(氮-咔唑基)-9芴酮使用20ml。
本发明的一种多孔有机聚合物骨架材料的制备方法中,搅拌时间优选24小时,搅拌时的温度优选80℃。
本发明的一种多孔有机聚合物骨架材料的制备方法中,所述的清洗可以按以下步骤进行:依次分别加入甲醇、水、二氯甲烷、丙酮,加入量均为反应过程中所用的2,7-二-(氮-咔唑基)-9芴酮质量的10-50倍,利用丙酮、甲醇分别索氏提取1-48小时。
本发明制备的多孔有机聚合物骨架材料具有高的比表面积、大的孔容和良好的光吸收性能,可以作为非均相催化剂应用在光催化领域。
一种多孔有机聚合物骨架材料的用途,其特征在于,将所述的多孔有机聚合物骨架材料应用于光催化有机胺选择性合成亚胺,具体操作为:在玻璃密闭反应器中加入有机胺、乙腈、多孔有机聚合物骨架材料,以氧气作为氧源,绿色的荧光灯作为激发光源,25℃下搅拌反应6~12小时,其中多孔有机聚合物骨架材料与有机胺的摩尔比为0.5~10:100,每mmol多孔有机聚合物骨架材料使用20~300ml的乙腈,反应混合物经过滤、萃取、干燥过微型硅胶柱得到亚胺产物。
一种多孔有机聚合物骨架材料的用途,其特征在于,将所述的多孔有机聚合物骨架材料应用于光催化硫醚选择性合成亚砜,具体操作为:在玻璃密闭反应器中加入硫醚、多孔有机聚合物骨架有混合溶剂,以氧气作为氧源,绿色的荧光灯作为激发光源,25℃下搅拌反应6~12小时,其中多孔有机聚合物骨架材料与硫醚的摩尔比为0.5~10:100,每mmol多孔有机聚合物骨架材料使用20~300ml混合溶剂,所述的混合溶剂是体积比为5:2的乙腈和甲醇的混合液,反应混合物经过滤、萃取、干燥过微型硅胶柱,得到亚砜产物。
在本发明的实施例中,通过测定本发明多孔有机聚合物骨架材料的傅立叶红外光谱证实材料确实是由2,7-二-(氮-咔唑基)-9芴酮与交联剂反应获得[参见:C.D.Wood,B.Tan,A.Trewin,H.J.Niu,D.Bradshaw,M.J.Rosseinsky,Y.Z.Kyimyak,N.L.Campbell,R.Kirk,E.Stockel,A.I.Cooper,Chemistry of Materials,2007,19,2034.];通过测定氮气吸附-脱附曲线计算本发明多孔聚合物骨架材料的比表面积、孔尺寸和孔体积;通过多孔有机聚合物骨架材料的催化实验证明其催化活性。
有益效果:
1、本发明采用廉价的路易斯酸催化剂。
2、本发明采用的制备方法非常简单,反应条件温和,可以在一个反应器皿中一步完成多孔有机聚合物的合成。
3、本发明采用的合成方法具有广泛的适用性。
4、本发明合成材料可作为光催化剂,在光照的下室温即可高效催化有机胺选择性合成亚胺及硫醚选择性合成亚砜,具有高度的原子经济性。
附图说明:
图1是实施例1中的多孔有机聚合物骨架材料的傅立叶红外图谱(IR)。
图2是实施例1中的多孔有机聚合物骨架材料的热失重图谱(TGA)。
图3是实施例1中的多孔有机聚合物骨架材料的吸收图谱(IR)。
图4是实施例1中多孔有机聚合物骨架材料的氮气吸附-脱附等温线(77K)。
图5是实施例2中多孔有机聚合物骨架材料的氮气吸附-脱附等温线(77K)。
图6是实施例3中多孔有机聚合物骨架材料的氮气吸附-脱附等温线(77K)。
具体实施方式
以下实施例将有助于理解本发明,但本发明的保护范围并不限于此内容,实施例1-3为本发明的一种多孔有机聚合物骨架材料的制备方法,实施例4-5为多孔有机聚合物骨架材料在非均相光催化领域的的应用。
实施例1
在惰性气体保护下,将2,7-二-(氮-咔唑基)-9芴酮(108.5mg,0.2mmol),二甲醇缩甲醛(70.8μL,0.8mmol)和FeCl3(0.13g,0.8mmol)置于50mL圆底烧瓶中,向其中加入4mL的1,2-二氯乙烷,混合液在80℃搅拌24h。待反应结束后,将体系冷却至室温,将反应生成的固体过滤,依次用10~30毫升的甲醇、水、二氯甲烷、丙酮清洗,利用丙酮、甲醇分别索氏提取12小时。将索氏提取后的固体产物真空干燥后得到棕褐色多孔有机聚合物骨架材料。
用比表面积及孔径分析仪(JW-BK 132F)对其进行比表面积及孔径分布检测,测得比表面积为1217m2g-1。孔体积为0.92cm3g-1。孔尺寸分布在0.6、0.8、1.1、2.1nm。
实施例2
在惰性气体保护下,将2,7-二-(氮-咔唑基)-9芴酮(108.5mg,0.2mmol),二甲醇缩甲醛(35.4μL,0.4mmol)和FeCl3(0.065g,0.4mmol)置于50mL圆底烧瓶中,向其中加入4mL的1,2-二氯乙烷,混合液在80℃搅拌24h。待反应结束后,将体系冷却至室温,将反应生成的固体过滤,依次用10~30毫升的甲醇、水、二氯甲烷、丙酮清洗,利用丙酮、甲醇分别索氏提取12小时。将索氏提取后的固体产物真空干燥后得到棕褐色多孔有机聚合物骨架材料。
用比表面积及孔径分析仪(JW-BK 132F)对其进行比表面积及孔径分布检测,测得比表面积为735m2g-1。孔体积为0.50cm3g-1。孔尺寸分布在0.6、1.0、1.2、2.3nm。
实施例3
在惰性气体保护下,将2,7-二-(氮-咔唑基)-9芴酮(108.5mg,0.2mmol),二甲醇缩甲醛(106.2μL,1.2mmol)和FeCl3(0.195g,1.2mmol)置于50mL圆底烧瓶中,向其中加入4mL的1,2-二氯乙烷,混合液在80℃搅拌24h。待反应结束后,将体系冷却至室温,将反应生成的固体过滤,依次用10~30毫升的甲醇、水、二氯甲烷、丙酮清洗,利用丙酮、甲醇分别索氏提取12小时。将索氏提取后的固体产物真空干燥后得到棕褐色多孔有机聚合物骨架材料。
用比表面积及孔径分析仪(JW-BK 132F)对其进行比表面积及孔径分布检测,测得比表面积为654m2g-1。孔体积为0.48cm3g-1。孔尺寸分布在0.5、0.8、1.1、2.3nm。
实施例4
称取实施例1中制备获得的多孔有机聚合物骨架材料5毫克(0.0088mmol),加入到反应瓶中,加入2mL乙腈和0.2mmol有机胺,在氧气条件、25℃、搅拌条件下利用绿色的荧光灯(功率30W,波长520nm)照射6小时。反应完毕后,利用1H-NMR计算产物收率,结果见表1。
表1多项催化剂催化活性举例
实施例5
称取实施例1中制备获得的多孔有机聚合物骨架材料5毫克(0.0088mmol),加入到反应瓶中,加入2mL乙腈、0.8mL甲醇和0.2mmol硫醚,在氧气条件、25℃、搅拌下利用绿色的荧光灯(功率100W,波长520nm)照射6小时。反应完毕后,利用GC计算产物收率,结果见表2。
表2多项催化剂催化活性举例
Claims (2)
1.一种多孔有机聚合物骨架材料的用途,所述的多孔有机聚合物骨架材料,是以2,7-二-(氮-咔唑基)-9芴酮为结构基元,通过二甲醇缩甲醛作为交联剂,在路易斯酸催化剂的催化下获得以亚甲基联接的多孔有机聚合物骨架材料;其特征在于,将所述的多孔有机聚合物骨架材料应用于光催化有机胺选择性合成亚胺,具体操作为:在玻璃密闭反应器中加入有机胺、乙腈、多孔有机聚合物骨架材料,以氧气作为氧源,绿色的荧光灯作为激发光源,25℃下搅拌反应6~12小时,其中多孔有机聚合物骨架材料与有机胺的摩尔比为0.5~10:100,每mmol多孔有机聚合物骨架材料使用20~300ml的乙腈,反应混合物经过滤、萃取、干燥过微型硅胶柱得到亚胺产物。
2.一种多孔有机聚合物骨架材料的用途,所述的多孔有机聚合物骨架材料,是以2,7-二-(氮-咔唑基)-9芴酮为结构基元,通过二甲醇缩甲醛作为交联剂,在路易斯酸催化剂的催化下获得以亚甲基联接的多孔有机聚合物骨架材料;其特征在于,将所述的多孔有机聚合物骨架材料应用于光催化硫醚选择性合成亚砜,具体操作为:在玻璃密闭反应器中加入硫醚、多孔有机聚合物骨架、混合溶剂,以氧气作为氧源,绿色的荧光灯作为激发光源,25℃下搅拌反应6~12小时,其中多孔有机聚合物骨架材料与硫醚的摩尔比为0.5~10:100,每mmol多孔有机聚合物骨架材料使用20~300ml混合溶剂,所述的混合溶剂是体积比为5:2的乙腈和甲醇的混合液,反应混合物经过滤、萃取、干燥过微型硅胶柱,得到亚砜产物。
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