## 1 Introduction  
Chirality is a fundamental research topic and of vital importance for various fields in natural sciences. Chiral biomolecules have been recognized as the basis of life on earth and many phenomena in nature could be explained through the concepts of stereoisomerism and chirality. In the last decades, the major efforts have been devoted to developing methods for creation and isolation of chiral organic molecules because of their significance in numerous applications [1; 2; 3]. Recently, increasing attention has been paid to the construction of chiral solid materials and chiral surfaces due to their potential to be applied in chiral adsorption, enantioseparations and catalysis [4; 5; 6; 7; 8; 9; 10; 11; 12; 13]. In particular, several methods have been developed for the fabrication of chiral silica in different morphologies [14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30]. These methods include the utilization of chiral surfactants or polymers as template, the condensation of silane monomers containing chiral organic groups and the grafting of chiral groups on the walls of mesoporous silica materials. A significant breakthrough in porous materials came in 1999 when three independent research groups discovered periodic mesoporous organosilicas (PMOs) [31; 32; 33]. PMO materials soon demonstrated their special position in the field of organic-inorganic hybrid materials [34; 35; 36; 37; 38; 39], and were investigated intensively in a wide range of applications such as optical materials, adsorbents, trapping agents, drug delivery agents, and catalyst supports [40; 41; 42; 43; 44; 45]. The success of these PMOs is mainly attributed to their convenient preparation. Within a few years, PMOs with myriad bridging organic groups, narrow distribution pore sizes, and well-defined pore geometries were synthesized and characterized [46; 47; 48; 49]. Generally, PMOs are synthesized by a sol-gel process under mild conditions and their preparation is based on the hydrolysis and condensation of bridged organo-alkoxysilane precursor compounds, (OR)\({}_{3}\)Si-R-Si(OR)\({}_{3}\), in the presence of surfactants or block copolymers that assist in creating uniform pores of 2-30 nm size [50; 51; 52; 53]. The organic moieties of the PMOs are implemented directly and distributed homogenously within the inorganic walls. This organic hybridization of the silicate network permits precise control over the surface properties, modification of the hydrophilic/hydrophobic character of the surface, alteration of the surface reactivity, protection of the surface from attack, and modification of the bulk properties of these materials [54; 55]. The surface area of PMOs can reach up to 1800 m\({}^{2}\)/g, which makes these materials particularly attractive for the various applications mentioned above. The development of chiral PMOs has recently represented a conspicuous success in material sciences [56; 57; 58; 59; 60; 61]. Chiral PMOs have also been prepared using chiral organosilane precursors and their potential for different applications was demonstrated in asymmetric catalysis [62; 63; 64; 65; 66; 67; 68], chiral chromatography [69; 70], and chiral separations [71; 72]. Initial attempts to prepare chiral PMOs were based on the co-condensation of chiral bis-alkoxysilane compounds or ligands with tetraalkoxysilane (e.g., tetraethoxysilane) [73; 74; 75]. The preparation routes are diverse, including in situ co-polymerization, post-condensation, and immobilization of chiral organic bis-alkoxysilane moieties [76; 77; 78; 79; 80; 81; 82; 83; 84; 85; 86; 87]. In addition, novel helical chirally doped PMOs were also reported [15; 61]. Usually, the loading of the chiral units into a PMO framework is less than 30% [88; 89; 90; 91; 92; 93; 94; 95; 96]. However, the catalytic activity and enantioselectivity of such chiral PMOs in asymmetric transformations is usually less than their homogeneous analogues.