Porous Dipeptide Crystals as Polymerization Nanoreactors

Distefano, Gaetano; Comotti, Angiolina; Bracco, Silvia; Beretta, Mario; Sozzani, Piero

doi:10.1002/anie.201204178

Cited by 44 publications

(39 citation statements)

References 55 publications

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Section: Discussionmentioning

confidence: 99%

“…[138] A series of porous dipeptides have been reported to adopt the same underlying porous structure. [320][321][322] For example, the chemistry of these dipeptide crystals can be tuned to control topochemical polymerization reactions in the crystal pores (Figure 23), and the volatility of adsorbed fluorinated ethers, which have application in anesthetics. [322] Davis et al reported that a molecular scaffold assembled with steroidal urea units, [323] contained 1D channels that could be decorated with different chemical functionalities, without altering the overall packing in the structure.…”

Section: Molecular Isomorphous Substitutionmentioning

confidence: 99%

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The Chemistry of Porous Organic Molecular Materials

Little

Cooper

2020

Adv Funct Materials

279

189

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Porous organic molecular materials are a subclass of porous solids that are defined by their modular, molecular structures, and the absence of extended covalent or coordination bonding in the solid-state. As a result, porous molecular materials are soluble and they can be processed into different forms, such as mixed matrix membranes. The structure of the porous modules can be fine-tuned for specific applications, such as gas isotope separations, and in some cases the solid-state properties of these materials can be defined by the structure of the porous molecule as viewed in isolation. In this review, the authors focus on the design of porous organic molecular materials and how their properties can be tuned for specific applications by using crystal engineering techniques. The authors distinguish between strategies where porosity is defined largely by the molecule itself, for example, in porous organic cages, and cases where porosity is generated by the solidstate crystalline assembly. They emphasize the importance of computational techniques in the de novo design of functional, porous organic molecular materials, and how molecular modeling is applied to understand the properties of these materials.

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Section: Discussionmentioning

confidence: 99%

Section: Molecular Isomorphous Substitutionmentioning

confidence: 99%

The Chemistry of Porous Organic Molecular Materials

Little

Cooper

2020

Adv Funct Materials

279

189

View full text Add to dashboard Cite

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“…13a). 531 Only the 1,4-trans polymers with high molecular weights were obtained from diene monomers as the geometry of the pores forbids all other congurations. For acrylonitrile, the isotactic polymer was exclusively obtained under mild temperature and pressure, a performance that cannot be achieved using classical polymerization techniques.…”

Section: Nanomaterials For Catalysismentioning

confidence: 99%

Supramolecular self-assemblies as functional nanomaterials

et al. 2013

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In this review, we survey the diversity of structures and functions which are encountered in advanced self-assembled nanomaterials. We highlight their flourishing implementations in three active domains of applications: biomedical sciences, information technologies, and environmental sciences. Our main objective is to provide the reader with a concise and straightforward entry to this broad field by selecting the most recent and important research articles, supported by some more comprehensive reviews to introduce each topic. Overall, this compilation illustrates how, based on the rules of supramolecular chemistry, the bottom-up approach to design functional objects at the nanoscale is currently producing highly sophisticated materials oriented towards a growing number of applications with high societal impact.

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“…From the integrals of the peaks, the polymer/host ratio was established to be 0.59 g g −1 . The content of included polymer in the hybrid matrix is high compared to that of confined polymerization in microporous materials2b and corresponds to a pore‐filling of about 70 % of the pore volume, based on bulk PAN density ( d =1.15 g cm −3 ) and the total free volume of PPS. From the NMR analysis it is apparent that the polymerization reaction went to completion as no monomer signals in 1 H or 13 C spectra were detected (see the Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Confined Polymerization in Highly Ordered Mesoporous Organosilicas

Comotti

Bracco

Beretta

et al. 2015

Chemistry A European J

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Hybrid mesoporous organosilica exhibiting crystal-like order in the walls provided an ideal channel reaction vessel for the confined polymerization of acrylonitrile (PAN). The resulting high-molecular-mass PAN fills the channels at high yield and forms an ordered nanostructure of polymer nanobundles enclosed into the hybrid matrix. The in situ thermal transformation of PAN into rigid polyconjugated and, eventually, into condensed polyaromatic carbon nanofibers, retains the periodic architecture. Simultaneously, the matrix evolves showing the fusion of the p-phenylene rings and the cleavage of carbonsilicon bonds: this gives rise to graphitic-carbon/silica nanocomposites containing hyper-oxydrylated silica nanophases. Interestingly, the 3D hexagonal mesostructure survives in the carbonaceous material. The exploitation of porous materials of high capacity and a hybrid nature, for polymerization in the confined state, followed by high temperature treatments, allowed us to achieve unique and precisely fabricated nanostructures, thus paving the way for the construction of fine-tuned electronic and light-harvesting materials.

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Porous Dipeptide Crystals as Polymerization Nanoreactors

Cited by 44 publications

References 55 publications

The Chemistry of Porous Organic Molecular Materials

The Chemistry of Porous Organic Molecular Materials

Supramolecular self-assemblies as functional nanomaterials

Confined Polymerization in Highly Ordered Mesoporous Organosilicas

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