Metal–organic frameworks (MOFs) are best known for their great structural diversity. The uniformity in the properties of MOFs is mainly governed by the size and morphology of the particles. In the present research, iron‐MIL‐88A was prepared by a modulator‐assisted solvothermal method, and the role of modulating agents in the formation process of MOF particles was investigated. Acetic acid and formic acid were chosen as monoligand modulating agents. The changes in morphology and size distribution of the products were scrutinized by using SEM micrographs. Both modulators clearly interfered with the crystallization process through their attachment to the reactive sites. At low modulator content, the primary diamondlike characteristic morphology of the particles was preserved. While acetic acid mildly altered the morphology of the MOF and narrowed its particle‐size distribution, formic acid drastically changed the morphology of the MOF particles to those resembling dendrites. The structural properties of the products were examined using XRD, FTIR, and TGA studies. Correct amounts of acetic acid improved the crystallinity of the product, while high contents of acetic acid greatly interfered with the formation process and had a paramount effect on the particle morphology evidenced by the decrease in the intensity of diffraction peaks.

中文翻译：

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富马酸铁MIL-88A金属-有机骨架的形态学改性，使用甲酸和乙酸作为调节剂

金属有机框架（MOF）以其巨大的结构多样性而闻名。MOFs特性的均匀性主要取决于颗粒的大小和形态。在本研究中，通过调节剂辅助溶剂热法制备了MIL-88A铁，并研究了调节剂在MOF颗粒形成过程中的作用。选择乙酸和甲酸作为单配体调节剂。使用SEM显微照片检查产物的形态和尺寸分布的变化。两种调节剂都通过与反应位点的连接而明显干扰了结晶过程。在低调制剂含量下，颗粒的主要菱形特征形态得以保留。乙酸可轻微改变MOF的形态并缩小其粒径分布，而甲酸则将MOF粒子的形态急剧改变为类似于树突的形态。使用XRD，FTIR和TGA研究检查了产品的结构性能。适量的乙酸可改善产物的结晶度，而高含量的乙酸则极大地影响了形成过程，并且对衍射峰强度的降低所证明的颗粒形态具有至关重要的作用。