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Zhang X, Sheng Y, Liu X, Yang J, Goddard Iii WA, Ye C, Zhang W. Polymer-Unit Graph: Advancing Interpretability in Graph Neural Network Machine Learning for Organic Polymer Semiconductor Materials. J Chem Theory Comput 2024; 20:2908-2920. [PMID: 38551455 DOI: 10.1021/acs.jctc.3c01385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
The graph representation of complex materials plays a crucial role in the field of inorganic and organic materials investigations for developing data-centric materials science, such as those using graph neural networks (GNNs). However, the currently prevalent GNN models are primarily employed for investigating periodic crystals and organic small molecule data, yet they still encounter challenges in terms of interpretability and computational efficiency when applied to polymer monomers and organic macromolecules data. There is still a lack of graph representation of organic polymers and macromolecules specifically tailored for GNN models to explore the structural characteristics. The Polymer-unit Graph, a novel coarse-grained graph representation method introduced in study, is dedicated to expressing and analyzing polymers and macromolecules. By incorporating the Polymer-unit Graph into the GNN models and analyzing the organic semiconductor (OSC) materials database, it becomes possible to uncover intricate structure-property relationships involving branched-chain engineering, fluoridation substitution, and donor-acceptor combination effects on the elementary structure of OSC polymers. Furthermore, the Polymer-unit Graph enables visualizing the relationship between target properties and polymer units while reducing training time by an impressive 98% and minimizing molecular graph representation models. In conclusion, the Polymer-unit Graph successfully integrates the concept of Polymer-unit into the field of GNNs, enabling more accurate analysis and understanding of organic polymers and macromolecules.
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Affiliation(s)
- Xinyue Zhang
- Department of Materials Science and Engineering & Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, PR China
| | - Ye Sheng
- Department of Materials Science and Engineering & Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, PR China
| | - Xiumin Liu
- Department of Materials Science and Engineering & Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, PR China
- Key Laboratory of Soft Chemistry and Functional Materials of MOE, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Jiong Yang
- Materials Genome Institute, Shanghai University, Shanghai 200444, PR China
| | - William A Goddard Iii
- Materials and Process Simulation Center (MSC), California Institute of Technology, Pasadena, California 91125, United States
| | - Caichao Ye
- Department of Materials Science and Engineering & Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, PR China
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, PR China
| | - Wenqing Zhang
- Department of Materials Science and Engineering & Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, PR China
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Nichifor M, Stanciu MC, Doroftei F. Self-assembly of dextran - b - deoxycholic acid polyester copolymers: Copolymer composition and self-assembly procedure tune the aggregate size and morphology. Carbohydr Polym 2020; 252:117147. [PMID: 33183605 DOI: 10.1016/j.carbpol.2020.117147] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/23/2020] [Accepted: 09/23/2020] [Indexed: 12/13/2022]
Abstract
Self-assembly potential of new amphiphilic block copolymers containing dextran (Mn 4500, 8000, 15,000) and a semi-rigid deoxycholic acid-oligoethyleneglycol polyester (Mn 2500-8800, 2 or 4 ethyleneglycol units), was evaluated as a function of copolymer composition and self-assembly procedure, using dynamic light scattering and transmission electron microscopy. Addition of copolymer solution to water provided small star-like micelles (∼ 100 nm), while addition of water to copolymer solution led to various morphologies and sizes (60-600 nm), depending on polymer composition. Worm-like micelles were obtained from a copolymer containing dextran with Mn 4500 and 66 wt% polyester, and vesicles were formed by copolymers prepared from dextran with Mn 8000 and containing 46 wt% polyester. Presence of a longer oligoethyleneglycol decreased the size of micelles and vesicles due to an enhanced flexibility of the polyester hydrophobic block. The results allow the selection of the most appropriate parameters to obtain the desired aggregate characteristics.
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Affiliation(s)
- Marieta Nichifor
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi, 700457, Romania.
| | | | - Florica Doroftei
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi, 700457, Romania
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Stanciu MC, Nichifor M, Mocanu G, Tuchilus C, Ailiesei GL. Block copolymers containing dextran and deoxycholic acid polyesters. Synthesis, self-assembly and hydrophobic drug encapsulation. Carbohydr Polym 2019; 223:115118. [DOI: 10.1016/j.carbpol.2019.115118] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 07/15/2019] [Accepted: 07/21/2019] [Indexed: 01/09/2023]
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Donvito A, Fantin G, Fogagnolo M, Giovannini PP, Scoponi M. Novel tri- and tetrafunctional cholic acid-based initiators for the synthesis of star-shaped poly(L-lactide)s. Des Monomers Polym 2016. [DOI: 10.1080/15685551.2016.1187437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
- Adelaide Donvito
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, Ferrara, Italy
| | - Giancarlo Fantin
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, Ferrara, Italy
| | - Marco Fogagnolo
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, Ferrara, Italy
| | - Pier Paolo Giovannini
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, Ferrara, Italy
| | - Marco Scoponi
- ISOF-CNR, sez. c/o Dip.to di Scienze Chimiche e Farmaceutiche dell’Università di Ferrara, Ferrara, Italy
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Abstract
Bile acids are gaining increasing importance as building blocks in the development of novel polymeric materials. This is evidenced by the growing number of publications advocating the advantages of their incorporation in the design and construction of materials. Composed of a rigid steroid backbone, functional groups with potential towards diverse reactions, and a biocompatible framework, there are various ways in which these molecules can be utilized to afford biomaterials via distinct architectures. Soft materials utilize the intrinsic capacity of bile acids to self-assemble and have seen a range of applications, most notably in the field of drug delivery. On the other hand, there is also the possibility of including bile acids in the polymer backbone, which has been used in the preparation of elastomers. This review discusses a selection of materials that can be prepared using bile acids and the advantages afforded by these molecules. Focus will be on the development of soft and hard materials, where soft materials are described as being held by weak intermolecular interactions, whereas hard materials are mechanically stronger with bile acids covalently incorporated in the polymer network.
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Affiliation(s)
- Alexander J. Cunningham
- Département de Chimie, Université de Montréal, C.P. 1628, Succursale Centre-ville, Montréal, QC H3C 3J7, Canada
- Département de Chimie, Université de Montréal, C.P. 1628, Succursale Centre-ville, Montréal, QC H3C 3J7, Canada
| | - X.X. Zhu
- Département de Chimie, Université de Montréal, C.P. 1628, Succursale Centre-ville, Montréal, QC H3C 3J7, Canada
- Département de Chimie, Université de Montréal, C.P. 1628, Succursale Centre-ville, Montréal, QC H3C 3J7, Canada
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