| 摘要: | 類沸石咪唑骨架材料是屬於金屬有機骨架材料的範疇，其主要是利用咪唑或是咪唑衍生
物(Im)當作有機配位體與鋅、鈷等過渡金屬(M)鍵結所形成的聚合物，結構中Im-M-Im的
鍵結角度約為145度，與天然沸石中Si-O-Si的鍵結角度大約相同，故被稱之為類沸石咪
唑骨架材料，目前主要有儲存氣體、分離混和氣體、非均相催化和藥物載體的應用。本
論文所介紹的類沸石咪唑骨架材料-90(Zeolitic Imidazolate Framework-90；ZIF-90)
已有報導指出此材料易於官能基化的特點，並具有極為優異的水熱穩定性。然而，目前
合成ZIF-90之方法大多需使用有機溶劑(如DMF)，但若大量製造ZIF-90時，所產生的廢
液將對於環境造成負擔。為了符合綠色化學之製程，此研究中，我們提供了一種於水相
系統中製備ZIF-90之方法，能夠製造出粒徑大小一致且尺寸具有均一性的ZIF-90。;In zeolitic imidazolate frameworks (ZIFs), a subclass of metal–organic
frameworks (MOFs), metal ions such as Zn2+ and Co2+ are linked through the
nitrogen atoms of the deprotonated imidazolate to form neutral frameworks
and provide a tunable crystalline structure and porosity and a high internal
surface area. Additionally, the M–Im–M angle is similar to that of the
Si–O–Si angle (145o) preferred in zeolites. This fact has led to the
synthesis of a large number of ZIFs with zeolite-type tetrahedral
topologies. Therefore, ZIFs have recently attracted considerable attention
for applications in gas storage, separation of small molecules,
heterogeneous catalysis, sensors and drug delivery.
Zeolitic Imidazolate Framework-90 (ZIF-90), the main character of the
thesis, was reported to have high thermal and solvent stability. However,
most of the strategies reported so far on the synthesis of ZIF-90 have
involved the use of solvents, such as dimethyl formamide (DMF), methanol, or
other organic solvents which are also expensive, in addition to their
environmental concerns, such as toxicity, high-pollution, and waste
treatment issues. Herein, we report for the first time, a rapid and
eco-friendly strategy for the synthesis of ZIF-90 under aqueous conditions,
and thus, ZIF-90 having uniform particle sizes can be produced. |
