新固载型手性Salen Mn(Ⅲ)催化剂的合成及催化苯乙烯不对称环氧化反应

以低聚苯乙烯基膦酸-磷酸氢锆(ZSPP)作为载体, 对该载体进行氯甲基化、磺酸化修饰后与手性Salen Mn(Ⅲ)轴向配位, 合成了一种新固载型手性Salen Mn(Ⅲ)催化剂; 采用FTIR,DR UV-Vis, AAS, SEM, TEM, TG和N2吸附等手段对催化剂进行了表征. 以苯乙烯不对称环氧化为探针反应, 初步考察了催化剂在不同氧源、 反应温度、 反应时间和催化剂用量等因素下的催化性能. 结果表明, 该催化剂具有良好的催化活性, 转化率最高达到85％, 选择性为90％, e.e.值为64％. 固载手性Salen Mn(Ⅲ)催化剂性质稳定, 能循环使用6次.     

可调苯氧基修饰的聚(苯乙烯-苯乙烯基膦酸)-磷酸氢锆固载手性Mn~III(Salen)高效催化烯烃环氧化（英文）

使用不同空间位阻的苯氧链接手臂修饰的聚(苯乙烯基-苯乙烯膦酸)-磷酸氢锆轴向固载手性MnIII(Salen)催化剂(Cat1–Cat3),随后在间氯过氧苯甲酸(m-CPBA)为氧化剂的体系中考察了固载催化剂的催化性能.同时,在相同氧化体系下测试了一系列均相催化剂类似物(Cat4–Cat6).结果表明,在非均相条件下,可调变苯氧链接手臂的邻位取代基对催化剂活性起着重要作用,环氧化产物的对映选择性随着取代基位阻的增加而增大,但产物转化率有一定程度下降.此外,非均相催化剂即使在没有轴向助剂的参与下(通常需要添加,为了增大催化活性)仍然表现出非常高的催化活性,尤其对α-甲基苯乙烯反应,其对映选择性从6.8%增加到76.8%,转化率从19.8%上升到90.7%.制备的非均相催化剂11次的循环使用实验表明,在前5次使用后催化剂活性与对映选择性没有明显变化.     

苯氧基修饰的聚(苯乙烯-异丙烯膦酸)磷酸氢锆固载手性Mn~Ⅲ(Salen)及其催化苯乙烯环氧化（英文）

制备了一系列通过苯氧基修饰的聚(苯乙烯-异丙烯膦酸)磷酸氢锆(ZPS-IPPA)轴向固载手性MnⅢ(Salen)催化剂,并将其应用于苯乙烯的环氧化反应。催化结果表明:苯氧链接手臂邻位取代基对于环氧化结果有重要影响,相比邻位取代基为-H和-CH3,取代基为t-Bu基团时,催化剂能够提供更高水平的对映选择性。同时,比较了两种长度几乎一致的链接手臂(-NH-C6H4-NH-,-O-C6H4-O-),结果表明:在没有轴向助剂N-甲基玛琳氮氧化物(NMO)参与下,在间氯过氧苯甲酸(m-CPBA)为氧化剂的体系中,链接手臂-O-C6H4-O-比-NH-C6H4-NH-更有利于取得优异的催化效果。制备的非均相催化剂重复使用5次后催化活性与对映选择性没有明显的变化。     

磺甲基化ZPS-IPPA轴向固载手性Salen Mn(Ⅲ)催化剂及催化烯烃环氧化反应

以聚(苯乙烯-异丙烯膦酸)-磷酸氢锆(ZPS-IPPA)为载体,对其苯环氯甲基化、磺酸化后与手性Salen Mn(Ⅲ)轴向配位,合成了一类新的固载型手性Salen Mn(Ⅲ)催化剂,采用FTIR,XPS,SEM,TEM,N2吸附等对催化剂表征.分别在次氯酸钠溶液和间氯过氧苯甲酸氧化体系中,考察了固载催化剂对苯乙烯、α-甲基苯乙烯、茚等非功能化烯烃不对称环氧化反应的催化性能,结果表明,与均相催化剂相比,对映体选择性明显提高.尤其在m-CPBA/NMO氧化体系中0℃反应12h,茚的环氧化物的转化率及ee值均达到99%以上.并且催化剂容易分离,回收使用5次仍能保持较好的催化性能.     

胺基功能化ZPS-PVPA固载手性MnⅢ(salen)的合成及不对称催化烯烃环氧化

以聚(苯乙烯-苯乙烯基膦酸)-磷酸氢锆(ZPS-PVPA)为催化剂载体, 通过3-氨丙基三甲氧基硅烷对其中无机磷酸氢锆的羟基进行修饰, 再与均相手性Mn^Ⅲ(salen)催化剂进行轴向配位固载, 实现了手性均相催化剂的非均相化. 催化剂的表征结果证实制得了非均相催化剂. 随后, 考察了该非均相催化剂对α-甲基苯乙烯、 苯乙烯以及茚不对称环氧化反应的催化性能. 结果表明, 以间氯过氧苯甲酸(m-CPBA)为氧化剂, 在 0 ℃反应 3 h, 催化剂用量为 0.03 mmol, 在轴向配体 N-甲基吗啉氮氧化物(NMO)的参与下, 催化剂能高效催化α-甲基苯乙烯的不对称环氧化, 反应的对映选择性(e. e.值)可达 91.5%, 转化率为 99%. 此外, 以茚为底物考察了催化剂的循环使用性能, 结果表明, 催化剂重复使用10次后, 反应的e. e.值(>90%)远高于在相同条件下均相Mn^Ⅲ(salen)催化剂催化茚反应的e. e.值(65%).     

有机-无机杂化载体-聚(苯乙烯-苯乙烯基膦酸)-磷酸氢锆-在烯烃环氧化反应中的应用

有机聚合物-无机杂化载体-聚(苯乙烯-苯乙烯基膦酸)-磷酸氢锆-轴向固载手性Salen Mn髥催化剂,将其应用于非官能烯烃的多相不对称环氧化反应。结果表明:在没有昂贵轴向添加剂参与下,产率与对映选择性均急剧增加。以间氯过氧苯甲酸(m-CPBA)为氧化剂催化氧化α-methylstyrene,转化率从25.0%上升到98.8%;对映选择性从5.3%提高到67.3%。催化剂在循环使用5次以后,催化活性无明显改变。     

胺基修饰的ZnPS-PVPA固载手性salen Mn(Ⅲ)高效催化非功能化烯烃不对称环氧化反应

手性环氧化物是用途很广的中间体,通过区域和立体选择性开环反应,手性环氧化物能转化为多种对映纯的手性化合物.烯烃不对称环氧化反应是制备光学活性环氧化物的重要途径,在医药、农药和香料等精细化学品合成中具有非常重要的意义.由于salen Mn(Ⅲ)化合物在非官能团化烯烃的不对称环氧化反应中表现出高的催化活性和对映选择性,以及相对于均相手性催化,非均相手性催化具有产品易于分离和催化剂可重复利用等优点,因而成为手性催化领域的研究热点.近年来关于手性salenMn(Ⅲ)化合物的固载化研究受到广泛关注.虽然均相Mn(salen)催化剂在不对称环氧化反应方面已取得很大进展,但是在反应后处理、催化剂分离回收以及产品纯化方面也存在一定缺陷.多相salen Mn(Ⅲ)催化体系与均相催化体系相比,具有催化剂易分离回收、环境友好、产物易纯化、操作成本低和可以使用连续流反应器以及大规模生产等优点.因为在均相催化体系中,Mn(salen)Cl可能形成无活性的μ-oxo-Mn(Ⅳ)二聚体,而将salen Mn(Ⅲ)催化剂固载后则可以抑制这种二聚体的形成,并且将salen Mn(Ⅲ)催化剂多相化之后还可以促使活性位点的分离,进而增加催化剂的稳定性和保持单催化活性中心的高催化活性.本课题组近年来探索了磷酸锆与聚苯乙烯这类典型的有机功能高分子的复合,制备了一系列有机-无机杂化材料如聚(苯乙烯-异丙烯膦酸)-磷酸氢锆(ZPS-IPPA)和聚(苯乙烯-苯乙烯基膦酸)-磷酸氢锆(ZPS-PVPA),以这一系列材料为载体,通过对载体中的苯环进行氯甲基化,再接枝磺烃基、胺基或苯氧基等连接基团制备了多种非均相手性salen Mn(Ⅲ)催化剂.所制备的这些多相催化剂在催化活性、稳定性和循环使用性等方面显示出优良性能.本文在上述研究基础上,在ZnPS-PVPA的苯环上引入氯甲基,然后通过接枝芳香二胺和脂肪二胺最后轴向配位固载手性salen Mn(Ⅲ),实现了手性salen-Mn(Ⅲ)均相催化剂的多相化.并运用FT-IR,UV-Vis,XRD,TG,TEM,SEM和N2吸附-脱附等测试手段对多相催化剂进行了表征.分别以NaClO、m-CPBA和NaIO4为氧化体系考察了固载手性salen-Mn(Ⅲ)催化剂催化苯乙烯、α-甲基苯乙烯及茚的不对称环氧化反应的性能,对不同的氧化体系存有选择性;同时考察了温度、时间及溶剂等因素对催化性能的影响.考察了不同连接基团修饰的ZnPS-PVPA固载的手性salen-Mn(Ⅲ)在催化烯烃环氧化方面是否具有很好的催化性能和对映选择性.考察了助催化剂在不同的氧化体系中是否扮演着不同的角色.催化数据显示,助催化剂NMO和咪唑在催化反应中起着不同的作用.在m-CPBA氧化体系中,添加助催化剂NMO不但不能改善催化性能反而降低催化活性;在NaIO4氧化体系中,添加助催化剂咪唑略微改善了催化性能.选择催化效果最好的催化剂在m-CPBA催化体系中考察其重复使用性能,结果表明,多相催化剂经过9次循环使用,仍然显示出较好的催化性能.选择催化性能最好的多相催化剂进行环氧化反应的放大反应,结果显示,当放大倍数达到100倍时仍显示出与实验计量相当的催化性能,其转化率和ee值最高均可超过99％,具有潜在的工业应用价值.     

胺基修饰的ZnPS-PVPA固载手性salen Mn(Ⅲ)高效催化非功能化烯烃不对称环氧化反应（英文）

手性环氧化物是用途很广的中间体,通过区域和立体选择性开环反应,手性环氧化物能转化为多种对映纯的手性化合物.烯烃不对称环氧化反应是制备光学活性环氧化物的重要途径,在医药、农药和香料等精细化学品合成中具有非常重要的意义.由于salen Mn(III)化合物在非官能团化烯烃的不对称环氧化反应中表现出高的催化活性和对映选择性,以及相对于均相手性催化,非均相手性催化具有产品易于分离和催化剂可重复利用等优点,因而成为手性催化领域的研究热点.近年来关于手性salen Mn(III)化合物的固载化研究受到广泛关注.虽然均相Mn(salen)催化剂在不对称环氧化反应方面已取得很大进展,但是在反应后处理、催化剂分离回收以及产品纯化方面也存在一定缺陷.多相salen Mn(III)催化体系与均相催化体系相比,具有催化剂易分离回收、环境友好、产物易纯化、操作成本低和可以使用连续流反应器以及大规模生产等优点.因为在均相催化体系中,Mn(salen)Cl可能形成无活性的μ-oxo-Mn(IV)二聚体,而将salen Mn(III)催化剂固载后则可以抑制这种二聚体的形成,并且将salen Mn(III)催化剂多相化之后还可以促使活性位点的分离,进而增加催化剂的稳定性和保持单催化活性中心的高催化活性.本课题组近年来探索了磷酸锆与聚苯乙烯这类典型的有机功能高分子的复合,制备了一系列有机-无机杂化材料如聚(苯乙烯-异丙烯膦酸)-磷酸氢锆(ZPS-IPPA)和聚(苯乙烯-苯乙烯基膦酸)-磷酸氢锆(ZPS-PVPA),以这一系列材料为载体,通过对载体中的苯环进行氯甲基化,再接枝磺烃基、胺基或苯氧基等连接基团制备了多种非均相手性salen Mn(III)催化剂.所制备的这些多相催化剂在催化活性、稳定性和循环使用性等方面显示出优良性能.本文在上述研究基础上,在ZnPS-PVPA的苯环上引入氯甲基,然后通过接枝芳香二胺和脂肪二胺最后轴向配位固载手性salen Mn(III),实现了手性salen-Mn(III)均相催化剂的多相化.并运用FT-IR,UV-Vis,XRD,TG,TEM,SEM和N2吸附-脱附等测试手段对多相催化剂进行了表征.分别以NaClO、m-CPBA和NaIO_4为氧化体系考察了固载手性salen-Mn(III)催化剂催化苯乙烯、α-甲基苯乙烯及茚的不对称环氧化反应的性能,对不同的氧化体系存有选择性;同时考察了温度、时间及溶剂等因素对催化性能的影响.考察了不同连接基团修饰的ZnPS-PVPA固载的手性salen-Mn(III)在催化烯烃环氧化方面是否具有很好的催化性能和对映选择性.考察了助催化剂在不同的氧化体系中是否扮演着不同的角色.催化数据显示,助催化剂NMO和咪唑在催化反应中起着不同的作用.在m-CPBA氧化体系中,添加助催化剂NMO不但不能改善催化性能反而降低催化活性;在NaIO_4氧化体系中,添加助催化剂咪唑略微改善了催化性能.选择催化效果最好的催化剂在m-CPBA催化体系中考察其重复使用性能,结果表明,多相催化剂经过9次循环使用,仍然显示出较好的催化性能.选择催化性能最好的多相催化剂进行环氧化反应的放大反应,结果显示,当放大倍数达到100倍时仍显示出与实验计量相当的催化性能,其转化率和ee值最高均可超过99%,具有潜在的工业应用价值.     

手性salen Mn(Ⅲ)的制备及其对α-甲基苯乙烯不对称环氧化反应的催化

本文以聚（苯乙烯-异丙烯膦酸）-磷酸氢锆（ZPS-IPPA）为载体,对该载体进行氯甲基化、胺化修饰后与手性Salen Mn(Ⅲ)轴向配位,合成了一种新的固载型手性Salen Mn(Ⅲ)催化剂,采用FTIR,DR UV-Vis,XPS,SEM,TEM,TG等手段对催化剂进行表征．以次氯酸钠和间氯过氧苯甲酸为氧化剂,考察了固载催化剂对ａ-甲基苯乙烯不对称环氧化反应的催化性能,结果表明,固载型催化剂的催化活性比相应均相催化剂略低,但对映体选择性明显提高．在NaClO/PPNO氧化剂体系中0 ℃反应24h,ａ-甲基苯乙烯环氧化物的转化率达68%,e.e.值达99%．循环使用8次后催化效果无明显降低．     

可调苯氧基修饰的聚(苯乙烯-苯乙烯基膦酸)-磷酸氢锆固载手性MnⅢ(Salen)高效催化烯烃环氧化

使用不同空间位阻的苯氧链接手臂修饰的聚（苯乙烯基-苯乙烯膦酸）-磷酸氢锆轴向固载手性Mn^Ⅲ（Salen）催化剂（Cat₁-Cat₃）,随后在间氯过氧苯甲酸（m-CPBA）为氧化剂的体系中考察了固载催化剂的催化性能. 同时,在相同氧化体系下测试了一系列均相催化剂类似物（Cat₄-Cat₆）. 结果表明,在非均相条件下,可调变苯氧链接手臂的邻位取代基对催化剂活性起着重要作用,环氧化产物的对映选择性随着取代基位阻的增加而增大,但产物转化率有一定程度下降. 此外,非均相催化剂即使在没有轴向助剂的参与下（通常需要添加,为了增大催化活性）仍然表现出非常高的催化活性,尤其对α-甲基苯乙烯反应,其对映选择性从6.8%增加到76.8%,转化率从19.8%上升到90.7%. 制备的非均相催化剂11次的循环使用实验表明,在前5次使用后催化剂活性与对映选择性没有明显变化.     

Enhanced epoxidation of soybean oil by novel Al2O3–ZrO2–TiO2 solid acid catalyst

This study aims to develop highly efficient, recyclable solid catalysts for the epoxidation of vegetable oils. An Al₂O₃–ZrO₂–TiO₂ solid acid catalyst was prepared by a co‐precipitation/impregnation method and characterised through scanning electron microscopy, energy‐dispersive spectroscopy, X‐ray diffraction, X‐ray photoelectron spectroscopy, Fourier‐transform infrared and nitrogen adsorption–desorption analyses. The solid acid catalyst with a high surface area and typical slit pore adsorption was successfully synthesised. Al₂O₃–ZrO₂–TiO₂ also exhibits high stability and improved catalytic efficiency in the epoxidation of soybean oil. An oil conversion rate of 86.6%, which is higher than that of conventional catalysts, was obtained with a catalyst loading of 0.8 wt% and was maintained at 76.6% even after recycling the catalyst three times. The performance of the solid catalyst was slightly superior to that of H₂SO₄. Therefore, this novel catalyst may potentially be applicable in catalysing soybean oil epoxidation.     

Efficient and selective hydrocarbon oxidation with sodium periodate catalyzed by supported manganese(III) porphyrin

Manganese(III) tetrakis(p-sulfonatophenyl)porphyrin was successfully bound to silica modified with zirconium. The heterogeneous catalyst, MnTPPS-silica, was characterized by SEM, FT-IR and diffuse reflectance UV-Vis spectroscopic techniques. MnTPPS-silica catalyzes alkene epoxidation and alkanes hydroxylation with sodium periodate under agitation with magnetic stirring and ultrasonic irradiation in the presence of imidazole as an axial ligand. This catalytic system shows a good activity in the epoxidation of linear alkenes. Alkyl aromatic and cycloalkanes were efficiently oxidized to their corresponding alcohols and ketones in the presence of this catalyst. This new heterogeneous catalyst is of high stability and reusability in the oxidation reactions and can be reused several times without loss of its activity.     

Synthesis of micronized CaO assisted by NH4HCO3 with Ca(OH)2 and its application in heterogeneously catalyzing transesterification reaction for producing biodiesel

Micronized CaO with pores was synthesized by calcining the reaction product CaCO₃ from NH₄HCO₃ and Ca(OH)₂. Scanning electron microscopy, X‐ray diffraction, energy dispersive X‐ray spectroscopy, X‐ray fluorescence, Fourier transform infrared spectroscopy, and Brunauer–Emmett–Teller analysis were used to characterize CaO, which confirmed that after calcining at 800°C for 2 hr, CaCO₃ was completely converted into porous micronized CaO with a surface area of about 7.295 m²/g and a particle size of 0.5–1.5 μm. The porous CaO microparticles were used as heterogeneous catalysts for producing biodiesel from transesterification of soybean oil and methanol. The influences of reaction time, calcined temperature, and reusability of CaO were explored. The experiments showed that CaO has high catalytic activity for transesterification reaction, and the yield of biodiesel reaches more than 98% under the conditions of methanol/oil mole ratio of 9, and the catalyst amount (catalyst/oil) of 3% after reaction for 2.5 hr. The CaO catalyst can be recycled easily and it also has the advantage of low pollution. Simple synthetic route, low cost, high catalytic activity, good reusability, and great potential for industrialization are the advantages of the porous micronized CaO catalyst that was proposed in this work.     

Cobalt imine–pyridine–carbonyl complex functionalized metal–organic frameworks as catalysts for alkene epoxidation

Aerobic epoxidation of alkene is a green and economical route to produce epoxides. For such reaction, transition metal complexes exhibit favorable catalytic activity. In this work, NH₂-MIL-101, a stable metal–organic framework (MOF) material with large surface area and high pore volume, was functionalized with pyridine-2,6-dicarbaldehyde and Co(NO₃)₂, to realize the immobilization of Co(II) via imine–pyridine–carbonyl (N,N,O) tridentate ligands bonding to MOF skeleton. The modified materials were applied as heterogeneous catalysts for the aerobic epoxidation of cyclohexene at ambient temperature, and multiple factors were studied to explore their influences on catalytic effects. Under the optimal reaction conditions, satisfactory substrate conversion and epoxide selectivity were reached. In addition, this catalytic system is suitable for a variety of alkene substrates. Furthermore, recycle experiments and infrared spectroscopy characterization illustrated that the coordination surroundings of Co are altering smoothly during the reaction process, thus having an impact on the performance of catalyst.

     

An Overview of Heterogeneous Transition Metal-Based Catalysts for Cyclohexene Epoxidation Reaction

Cyclohexane epoxide, which contains highly active epoxy groups, plays a crucial role as an intermediate in the preparation of fine chemicals. However, controlling the epoxidation pathway of cyclohexene is challenging due to issues such as the allylic oxidation of cyclohexene and the ring opening of cyclohexane epoxide during the cyclohexene epoxidation process to form cyclohexane oxide. This review focuses on the structure-activity relationships and synthesis processes of various heterogeneous transition metal-based catalysts used in cyclohexene epoxidation reactions, including molybdenum(Mo)-based, tungsten(W)-based, vanadium(V)-based, titanium(Ti)-based, cobalt(Co)-based, and other catalysts. Initially, the mechanism of cyclohexene epoxidation by transition metal-based catalysts is examined from the perspective of catalytic active centers. Subsequently, the current research of cyclohexene epoxidation catalysts is summarized based on the perspective of catalyst support. Additionally, the differences between alkyl hydroperoxide, hydrogen peroxide (H₂O₂), and oxygen (O₂) as oxidants are analyzed. Finally, the main factors influencing catalytic performance are summarized, and reasonable suggestions for catalyst design are proposed. This work provides scientific support for the advancement of the olefin epoxidation industry.     

Effect of the pore size of Co/SBA-15 isomorphically substituted with zirconium on its catalytic performance in Fischer-Tropsch synthesis

Cobalt catalysts supported on a series of mesoporous SBA-15 materials isomorphically substituted with zirconium (Zr/Si atomic ratio = 1/20) with different pore sizes (5.7 nm, 7.8 nm, 11.6 nm, 17.6 nm) have been synthesized. The catalysts were characterized by transmission electron microscopy, ²⁹Si solid state magic angle spinning (MAS) NMR, N₂ adsorption-desorption measurements, X-ray powder diffraction, X-ray photoelectron spectroscopy, H₂-temperature programmed reduction, H₂-temperature programmed desorption and O₂ titrations. The results indicated that larger pore size led to weaker interactions between cobalt and the supports which lowered the temperature of both reduction steps (Co₃O₄→CoO and CoO→Co⁰). The catalytic performances of the catalysts in Fischer-Tropsch synthesis (FTS) were tested in a fixed bed reactor. It was found that the FTS catalytic activity and product selectivity depended strongly on the pore size of the catalysts. The catalyst with a pore size of 7.8 nm showed the best FTS activity, and the catalyst with a pore size of 17.6 nm showed the highest selectivity to C₁₂–C₂₀ and C₂₀₊ hydrocarbons.     

Zr 改性MnOx/MWCNTs催化剂的结构特征与低温SCR活性

以ZrO（NO₃）₂·2H₂O为前驱体对多壁碳纳米管（MWCNTs）进行了改性并负载MnO_x制备了MnO_x/ZrO₂/MWCNTs 催化剂. 考察了Zr 对催化剂低温选择性催化还原（SCR）反应活性的影响,并通过多种分析手段对催化剂的结构进行了表征. 结果表明Zr 的添加对催化剂的低温SCR活性具有显著的促进作用,当Zr 负载量为30%时,催化剂活性最佳. X射线衍射（XRD）、拉曼（Raman）光谱、透射电镜（TEM）、N₂吸附-脱附的表征结果分析表明,适量的Zr 改性促进了MnO_x在载体表面的分散,增强金属氧化物与MWCNTs 之间的作用,也能增加催化剂的比表面积、孔容和孔径. X 射线光电子能谱（XPS）、H₂程序升温还原（H₂-TPR）和NH₃程序升温脱附（NH₃-TPD）的分析结果则显示,Zr 能提高催化剂表面化学吸附氧浓度,促进Mn³⁺转化为Mn⁴⁺,从而使催化剂表面的活性位点增多,氧化还原能力增强,同时还提高了催化剂表面酸性位点的数量和强度,促进了NH₃的吸附,是MnO_x/ZrO₂/MWCNTs 催化剂低温SCR活性提高的主要原因.     

Pore tuned activated carbons as supports for an enantioselective molecular catalyst

The Jacobsen catalyst was immobilized onto four activated carbons with different average pore sizes, achieved by a gasification process followed by molecular oxygen oxidation. The influence of the textural properties of the activated carbon in the immobilization process and in the catalytic performance of the Mn(III) heterogeneous catalysts was investigated in detail. Three different catalytic systems were studied: styrene epoxidation using m-chloroperoxybenzoic acid; 6-CN-2,2-diMeChromene epoxidation using NaOCl and iodosylbenzene (PhIO) as oxidants. The catalysts tested were active and enantioselective in the three systems studied. Selectivity towards the desired epoxide only decreases in the case of the material with smaller pores, remaining identical to that of the homogeneous phase in all the other materials. The enantiomeric excess values (%ee) for alkene epoxidation increase with the pore size of the heterogeneous catalysts, and these values are even higher than the homogeneous counterparts in the styrene epoxidation reaction. Total Mn(III) loadings increase with the pore size, as well as their distribution within the carbon porous matrix. Characterization of the activated carbons bearing the immobilized manganese(III) complexes by TPD and XPS point to reaction between carbon surface phenolate groups and the manganese(III) complexes through axial coordination of the metal centers to these groups.