Tunable two-color luminescence and host-guest energy transfer of fluorescent chromophores encapsulated in metal-organic frameworks.
Tunable two-color luminescence and host-guest energy transfer of fluorescent chromophores encapsulated in metal-organic frameworks.
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DOI：
10.1038/srep04337
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发表时间：
2014-03-11
影响因子：
4.6
通讯作者：
Wang D
中科院分区：
文献类型：
--
作者：
Yan D;Tang Y;Lin H;Wang D
发色团客体与主体基质的共组装可以提供具有不同于单个组分的光官能度的材料。与粘土和沸石材料相比，使用金属有机框架（MOFs）作为主体结构来制备发光主-客体材料仍处于早期阶段。在此，我们报告了激光染料，4-（二氰基亚甲基）-2-甲基-6-（4-二甲基氨基苯乙烯基）-4H-吡喃（DCM），纳入芪为基础的和萘为基础的MOF系统。所得到的材料表现出蓝色/红色双色发射，并且通过3D共聚焦荧光显微镜检测，蓝色与红色荧光的强度比在MOF晶体内的不同平面中变化。所观察到的比率荧光的变化表明发生的能量转移从MOF主机DCM分子，这可以进一步证实周期性密度泛函理论（DFT）计算。此外，在用挥发性有机化合物（甲醇、丙酮和甲苯）处理客体@MOF样品时观察到发光行为的选择性变化，表明这些主-客体系统具有作为荧光传感器的潜在应用。可以预期，通过合理选择具有合适的发射颜色和能级的MOF主体和客体发色团，可以以类似的方式容易地制备各种各样的多色发光和能量转移系统。
Co-assembly of chromophore guests with host matrices can afford materials which have photofunctionalities different from those of individual components. Compared with clay and zeolite materials, the use of metal–organic frameworks (MOFs) as a host structure for fabricating luminescent host–guest materials is still at an early stage. Herein, we report the incorporation of a laser dye, 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM), into stilbene-based and naphthalene-based MOF systems. The resulting materials exhibit blue/red two-color emission, and the intensity ratio of blue to red fluorescence varies in different planes within the MOF crystal as detected by 3D confocal fluorescence microscopy. The observed changes in ratiometric fluorescence suggest the occurrence of energy transfer from MOF host to DCM molecules, which can be further confirmed by periodic density functional theoretical (DFT) calculations. Moreover, selective changes in luminescence behavior are observed on treating the guest@MOF samples with volatile organic compounds (methanol, acetone and toluene), indicating that these host–guest systems have potential applications as fluorescence sensors. It can be expected that by rational selection of MOF hosts and guest chromophores with suitable emissive colors and energy levels, a wide variety of multi-color luminescent and energy-transfer systems can readily be prepared in a similar manner.
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影响因子：
29.4
作者：
Busby, Michael;Kerschbaumer, Hannes;De Cola, Luisa
通讯作者：
De Cola, Luisa
影响因子：
3.1
作者：
Ohba, Masaaki;Yoneda, Ko;Kitagawa, Susumu
通讯作者：
Kitagawa, Susumu
影响因子：
41.2
作者：
Mcculloch, I;Heeney, M;Toney, MF
通讯作者：
Toney, MF
影响因子：
4.3
作者：
Gruenker, Ronny;Bon, Volodymyr;Kaskel, Stefan
通讯作者：
Kaskel, Stefan
影响因子：
29.4
作者：
Cucinotta, Fabio;Popovic, Zoran;De Cola, Luisa
通讯作者：
De Cola, Luisa