1
|
Yin J, Choi S, Pyle D, Guest JR, Dong G. Backbone Engineering of Monodisperse Conjugated Polymers via Integrated Iterative Binomial Synthesis. J Am Chem Soc 2023; 145:19120-19128. [PMID: 37603817 PMCID: PMC10472507 DOI: 10.1021/jacs.3c08143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Indexed: 08/23/2023]
Abstract
Synthesis of sequence-defined monodisperse π-conjugated polymers with versatile backbones remains a substantial challenge. Here we report the development of an integrated iterative binomial synthesis (IIBS) strategy to enable backbone engineering of conjugated polymers with precisely controlled lengths and sequences as well as high molecular weights. The IIBS strategy capitalizes on the use of phenol as a surrogate for aryl bromide and represents the merge between protecting-group-aided iterative synthesis (PAIS) and iterative binomial synthesis (IBS). Long and monodisperse conjugated polymers with diverse irregular backbones, which are inaccessible by conventional polymerizations, can be efficiently prepared by IIBS. In addition, topology-dependent and chain-length-dependent properties have been investigated.
Collapse
Affiliation(s)
- Jiangliang Yin
- Department
of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Shinyoung Choi
- Department
of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Daniel Pyle
- Department
of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Jeffrey R. Guest
- Center
for Nanoscale Materials, Argonne National
Laboratory, Lemont, Illinois 60439, United States
| | - Guangbin Dong
- Department
of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| |
Collapse
|
2
|
Greenstein BL, Hiener DC, Hutchison GR. Computational Evolution of High-Performing Unfused Non-Fullerene Acceptors for Organic Solar Cells. J Chem Phys 2022; 156:174107. [DOI: 10.1063/5.0087299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Materials optimization for organic solar cells (OSCs) is a highly active field, with many approaches using empirical experimental synthesis, computational brute-force approaches to screen candidates in a given subset of chemical space, or generative machine learning methods which often require significant training sets. While these methods may find high-performing materials, they can be inefficient and time-consuming. Genetic algorithms (GAs) are an alternative approach, allowing for the "virtual synthesis" of molecules and a prediction of their ``fitness' for some property, with new candidates suggested based on good characteristics of previously generated molecules. In this work, a GA is used to discover high-performing unfused non-fullerene acceptors (NFAs) based on an empirical prediction of power conversion efficiency (PCE) and provides design rules for future work. The electron withdrawing/donating strength, as well as the sequence and symmetry of those units are examined. The utilization of a GA over a brute force approach resulted in speedups up to $1.8 \times 10^{12}$. New types of units not frequently seen in OSCs are suggested, and in total 5,426 NFAs are discovered with the GA. Of these, 1,087 NFAs are predicted to have a PCE greater than 18\%, which is roughly the current record efficiency. While the symmetry of the sequence showed no correlation with PCE, analysis of the sequence arrangement revealed that higher performance can be achieved with a donor core and acceptor end groups. Future NFA designs should consider this strategy as an alternative to the current A-D-A$'$-D-A architecture.
Collapse
|
3
|
Precise Pentamers with Diverse Monomer Sequences and Their Thermal Properties. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2689-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4
|
Liu R, Yang C, Huang Z, French R, Gu Z, Cheng J, Guo K, Xu J. Unraveling Sequence Effect on Glass Transition Temperatures of Discrete Unconjugated Oligomers. Macromol Rapid Commun 2021; 43:e2100666. [PMID: 34850490 DOI: 10.1002/marc.202100666] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/23/2021] [Indexed: 01/03/2023]
Abstract
Sequence plays a critical role in enabling unique properties and functions of natural biomolecules, which has promoted the rapid advancement of synthetic sequence-defined polymers in recent decades. Particularly, investigation of short chain sequence-defined oligomers (also called discrete oligomers) on their properties has become a hot topic. However, most studies have focused on discrete oligomers with conjugated structures. In contrast, unconjugated oligomers remain relatively underexplored. In this study, three pairs of discrete oligomers with the same composition but different sequence for each pair are employed for investigating their glass transition temperatures (Tg s). The resultant Tg s of sequenced oligomers in each pair are found to be significantly different (up to 11.6 °C), attributable to variations in molecular packing as demonstrated by molecular dynamics and density function theory simulations. Intermolecular interaction is demonstrated to have less impact on Tg s than intramolecular interaction. The mechanistic investigation into two model dimers suggests that monomer sequence caused the difference in intramolecular rotational flexibility of the sequenced oligomers. In addition, despite having different monomer sequence and Tg s, the oligomers have very similar solubility parameters, which supports their potential use as effective oligomeric plasticizers to tune the Tg s of bulk polymer materials.
Collapse
Affiliation(s)
- Ruizhe Liu
- School of Chemical Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Chao Yang
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan, 410082, P. R. China
| | - Zixuan Huang
- School of Chemical Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Rohan French
- School of Chemical Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Zi Gu
- School of Chemical Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Jianli Cheng
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, Sichuan, 621900, P. R. China
| | - Kunkun Guo
- College of Materials Science and Engineering, Hunan University, Changsha, Hunan, 410082, P. R. China
| | - Jiangtao Xu
- School of Chemical Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| |
Collapse
|
5
|
Xu C, He C, Li N, Yang S, Du Y, Matyjaszewski K, Pan X. Regio- and sequence-controlled conjugated topological oligomers and polymers via boronate-tag assisted solution-phase strategy. Nat Commun 2021; 12:5853. [PMID: 34615871 PMCID: PMC8494804 DOI: 10.1038/s41467-021-26186-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 09/20/2021] [Indexed: 12/03/2022] Open
Abstract
The regulation of polymer topology and the precise control over the monomer sequence is crucial and challenging in polymer science. Herein, we report an efficient solution-phase synthetic strategy to prepare regio- and sequence-controlled conjugated polymers with topological variations via the usage of methyliminodiacetic acid (MIDA) boronates. Based on the solubility of MIDA boronates and their unusual binary affinity for silica gel, the synthesized regio- and sequence-defined conjugated oligomers can be rapidly purified via precipitation or automatic liquid chromatography. These synthesized discrete oligomers can be used for iterative exponential and sequential growth to obtain linear and dendrimer-like star polymers. Moreover, different topological sequence-controlled conjugated polymers are conveniently prepared from these discrete oligomers via condensation polymerization. By investigating the structure-property relationship of these polymers, we find that the optical properties are strongly influenced by the regiochemistry, which may give inspiration to the design of optoelectronic polymeric materials.
Collapse
Affiliation(s)
- Chaoran Xu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Congze He
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Ning Li
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Shicheng Yang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Yuxuan Du
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, United States.
| | - Xiangcheng Pan
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China.
| |
Collapse
|
6
|
Affiliation(s)
- J. Charlie Maier
- Department of Physics, University of Illinois at Urbana-Champaign, 1110 W Green Street, Urbana, Illinois 61801, United States
| | - Nicholas E. Jackson
- Department of Chemistry, University of Illinois at Urbana-Champaign, 505 S Mathews Avenue, Urbana, Illinois 61801, United States
| |
Collapse
|
7
|
Elacqua E, Koehler SJ, Hu J. Electronically Governed ROMP: Expanding Sequence Control for Donor–Acceptor Conjugated Polymers. Synlett 2020. [DOI: 10.1055/s-0040-1707180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Controlling the primary sequence of synthetic polymers remains a grand challenge in chemistry. A variety of methods that exert control over monomer sequence have been realized wherein differential reactivity, pre-organization, and stimuli-response have been key factors in programming sequence. Whereas much has been established in nonconjugated systems, π-extended frameworks remain systems wherein subtle structural changes influence bulk properties. The recent introduction of electronically biased ring-opening metathesis polymerization (ROMP) extends the repertoire of feasible approaches to prescribe donor–acceptor sequences in conjugated polymers, by enabling a system to achieve both low dispersity and controlled polymer sequences. Herein, we discuss recent advances in obtaining well-defined (i.e., low dispersity) polymers featuring donor–acceptor sequence control, and present our design of an electronically ambiguous (4-methoxy-1-(2-ethylhexyloxy) and benzothiadiazole-(donor–acceptor-)based [2.2]paracyclophanediene monomer that undergoes electronically dictated ROMP. The resultant donor–acceptor polymers were well-defined (Đ = 1.2, Mn > 20 k) and exhibited lower energy excitation and emission in comparison to ‘sequence-ill-defined’ polymers. Electronically driven ROMP expands on prior synthetic methods to attain sequence control, while providing a promising platform for further interrogation of polymer sequence and resultant properties.1 Introduction to Sequence Control2 Sequence Control in Polymers3 Multistep-Synthesis-Driven Sequence Control4 Catalyst-Dictated Sequence Control5 Electronically Governed Sequence Control6 Conclusions
Collapse
|
8
|
Well-Defined Conjugated Macromolecules Based on Oligo(Arylene Ethynylene)s in Sensing. Processes (Basel) 2020. [DOI: 10.3390/pr8050539] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Macromolecules with well-defined structures in terms of molar mass and monomer sequence became interesting building blocks for modern materials. The precision of the macromolecular structure makes fine-tuning of the properties of resulting materials possible. Conjugated macromolecules exhibit excellent optoelectronic properties that make them exceptional candidates for sensor construction. The importance of chain length and monomer sequence is particularly important in conjugated systems. The oligomer length, monomer sequence, and structural modification often influence the energy bang gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of the molecules that reflect in their properties. Moreover, the supramolecular aggregation that is often observed in oligo-conjugated systems is usually strongly affected by even minor structural changes that are used for sensor designs. This review discusses the examples of well-defined conjugated macromolecules based on oligo(arylene ethynylene) skeleton used for sensor applications. Here, exclusively examples of uniform macromolecules are summarized. The sensing mechanisms and importance of uniformity of structure are deliberated.
Collapse
|
9
|
Komanduri V, Tate DJ, Marcial-Hernandez R, Kumar DR, Turner ML. Synthesis and ROMP of Benzothiadiazole Paracyclophane-1,9-Dienes to Donor–Acceptor Alternating Arylenevinylene Copolymers. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01244] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Venukrishnan Komanduri
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Daniel J. Tate
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | | | - Dharam R. Kumar
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Michael L. Turner
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| |
Collapse
|
10
|
Fortney A, Tsai CH, Banerjee M, Yaron D, Kowalewski T, Noonan KJT. Impact of Precise Control over Microstructure in Thiophene–Selenophene Copolymers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01434] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Andria Fortney
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Chia-Hua Tsai
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Manali Banerjee
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - David Yaron
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Tomasz Kowalewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Kevin J. T. Noonan
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| |
Collapse
|
11
|
Huang Z, Noble BB, Corrigan N, Chu Y, Satoh K, Thomas DS, Hawker CJ, Moad G, Kamigaito M, Coote ML, Boyer C, Xu J. Discrete and Stereospecific Oligomers Prepared by Sequential and Alternating Single Unit Monomer Insertion. J Am Chem Soc 2018; 140:13392-13406. [DOI: 10.1021/jacs.8b08386] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Zixuan Huang
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW, Sydney, NSW 2052, Australia
| | - Benjamin B. Noble
- ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Nathaniel Corrigan
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW, Sydney, NSW 2052, Australia
| | - Yingying Chu
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW, Sydney, NSW 2052, Australia
| | - Kotaro Satoh
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Donald S. Thomas
- Nuclear Magnetic Resonance Facility, Mark Wainwright Analytical Centre, UNSW, Sydney, NSW 2052, Australia
| | - Craig J. Hawker
- Materials Research Laboratory and Departments of Materials, Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Graeme Moad
- CSIRO, Manufacturing Bag 10, Clayton South, VIC 3169, Australia
| | - Masami Kamigaito
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Michelle L. Coote
- ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW, Sydney, NSW 2052, Australia
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW, Sydney, NSW 2052, Australia
| |
Collapse
|
12
|
Zhou Z, Palermo EF. Templated Ring-Opening Metathesis (TROM) of Cyclic Olefins Tethered to Unimolecular Oligo(thiophene)s. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00998] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zhe Zhou
- Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Edmund F. Palermo
- Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| |
Collapse
|
13
|
Szymański JK, Abul-Haija YM, Cronin L. Exploring Strategies To Bias Sequence in Natural and Synthetic Oligomers and Polymers. Acc Chem Res 2018; 51:649-658. [PMID: 29493212 DOI: 10.1021/acs.accounts.7b00495] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Millions of years of biological evolution have driven the development of highly sophisticated molecular machinery found within living systems. These systems produce polymers such as proteins and nucleic acids with incredible fidelity and function. In nature, the precise molecular sequence is the factor that determines the function of these macromolecules. Given that the ability to precisely define sequence emerges naturally, the fact that biology achieves unprecedented control over the unit sequence of the monomers through evolved enzymatic catalysis is incredible. Indeed, the ability to engineer systems that allow polymer synthesis with precise sequence control is a feat that technology is yet to replicate in artificial synthetic systems. This is the case because, without access to evolutionary control for finely tuned biological catalysts, the inability to correct errors or harness multiple competing processes means that the prospects for digital control of polymerization have been firmly bootstrapped to biological systems or limited to stepwise synthetic protocols. In this Account, we give an overview of strategies that have been used over the last 5 years in efforts to program polymer synthesis with sequence control in the laboratory. We also briefly explore how the use of robotics, algorithms, and stochastic chemical processes might lead to new understanding, mechanisms, and strategies to achieve full digital control. The aim is to see whether it is possible to go beyond bootstrapping to biological polymers or stepwise chemical synthesis. We start by describing nonenzymatic techniques used to obtain sequence-controlled natural polymers, a field that lends itself to direct application of insights gleaned from biology. We discuss major advances, such as the use of rotaxane-based molecular machines and templated approaches, including the utilization of biological polymers as templates for purely synthetic chains. We then discuss synthetic polymer chemistry, whose array of techniques allows the production of polymers with enormous structural and functional diversity, but so far with only limited control over the unit sequence itself. Synthetic polymers can be subdivided into multiple classes depending on the nature of processes used to synthesize them, such as by addition or condensation. Consequently, varied approaches for sequence control have been demonstrated in the area, including but not limited to click reactions, iterative solid-phase chemistry, and exploiting the chemical affinity of the monomers themselves. In addition to those, we highlight the importance of environmental bias in possible control of polymerization at the single-unit level, such as using catalyst switching or external stimuli. Even the most successful experimental sequence control approach needs appropriate tools to verify its scope and validity; therefore, we devote part of the present Account to possible analytical approaches to sequence readout, starting with well-established tandem mass spectrometry techniques and touching on those more applicable to specific classes of processes, such as diffusion-ordered NMR spectroscopy. Finally, we discuss progress in modeling and automation of sequence-controlled polymers. We postulate that developments in analytical chemistry, bioinformatics, and computer modeling will lead to new ways of exploring the development of new strategies for the realization of sequence control by means of sequence bias. This is the case because treating the assembly of polymers as a network of chemical reactions will enable the development of control strategies that can bias the outcome of the polymer assembly. The grand aim would be the synthesis of complex polymers in one step with a precisely defined digital sequence.
Collapse
Affiliation(s)
- Jan K. Szymański
- WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ, U.K
| | | | - Leroy Cronin
- WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ, U.K
| |
Collapse
|
14
|
The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2016. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
15
|
Solleder SC, Schneider RV, Wetzel KS, Boukis AC, Meier MAR. Recent Progress in the Design of Monodisperse, Sequence-Defined Macromolecules. Macromol Rapid Commun 2017; 38. [DOI: 10.1002/marc.201600711] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 01/25/2017] [Indexed: 12/28/2022]
Affiliation(s)
- Susanne C. Solleder
- Karlsruhe Institute of Technology (KIT); Institute of Organic Chemistry (IOC); Materialwissenschaftliches Zentrum für Energiesysteme (MZE); Geb. 30.48, Straße am Forum 7 76131 Karlsruhe Germany
| | - Rebekka V. Schneider
- Karlsruhe Institute of Technology (KIT); Institute of Organic Chemistry (IOC); Materialwissenschaftliches Zentrum für Energiesysteme (MZE); Geb. 30.48, Straße am Forum 7 76131 Karlsruhe Germany
| | - Katharina S. Wetzel
- Karlsruhe Institute of Technology (KIT); Institute of Organic Chemistry (IOC); Materialwissenschaftliches Zentrum für Energiesysteme (MZE); Geb. 30.48, Straße am Forum 7 76131 Karlsruhe Germany
| | - Andreas C. Boukis
- Karlsruhe Institute of Technology (KIT); Institute of Organic Chemistry (IOC); Materialwissenschaftliches Zentrum für Energiesysteme (MZE); Geb. 30.48, Straße am Forum 7 76131 Karlsruhe Germany
| | - Michael A. R. Meier
- Karlsruhe Institute of Technology (KIT); Institute of Organic Chemistry (IOC); Materialwissenschaftliches Zentrum für Energiesysteme (MZE); Geb. 30.48, Straße am Forum 7 76131 Karlsruhe Germany
| |
Collapse
|
16
|
Weiss RM, Li J, Liu HH, Washington MA, Giesen JA, Grayson SM, Meyer TY. Determining Sequence Fidelity in Repeating Sequence Poly(lactic-co-glycolic acid)s. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02202] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ryan M. Weiss
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Jian Li
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Han H. Liu
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Michael A. Washington
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Joseph A. Giesen
- Department
of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Scott M. Grayson
- Department
of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Tara Y. Meyer
- Department
of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
- McGowan
Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| |
Collapse
|
17
|
Zhang S, Bauer NE, Kanal IY, You W, Hutchison GR, Meyer TY. Sequence Effects in Donor–Acceptor Oligomeric Semiconductors Comprising Benzothiadiazole and Phenylenevinylene Monomers. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02215] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Shaopeng Zhang
- Department
of Chemistry, University of Pittsburgh, Pittsburgh Pennsylvania 15260, United States
| | - Nicole E. Bauer
- Department
of Chemistry, University of North Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599, United States
| | - Ilana Y. Kanal
- Department
of Chemistry, University of Pittsburgh, Pittsburgh Pennsylvania 15260, United States
| | - Wei You
- Department
of Chemistry, University of North Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599, United States
- Department
of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Geoffrey R. Hutchison
- Department
of Chemistry, University of Pittsburgh, Pittsburgh Pennsylvania 15260, United States
- Department
of Chemical Engineering University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Tara Y. Meyer
- Department
of Chemistry, University of Pittsburgh, Pittsburgh Pennsylvania 15260, United States
- McGowan
Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States
| |
Collapse
|
18
|
Washington MA, Swiner DJ, Bell KR, Fedorchak MV, Little SR, Meyer TY. The impact of monomer sequence and stereochemistry on the swelling and erosion of biodegradable poly(lactic-co-glycolic acid) matrices. Biomaterials 2016; 117:66-76. [PMID: 27936418 DOI: 10.1016/j.biomaterials.2016.11.037] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 11/12/2016] [Accepted: 11/24/2016] [Indexed: 01/01/2023]
Abstract
Monomer sequence is demonstrated to be a primary factor in determining the hydrolytic degradation profile of poly(lactic-co-glycolic acid)s (PLGAs). Although many approaches have been used to tune the degradation of PLGAs, little effort has been expended in exploring the sequence-control strategy exploited by nature in biopolymers. Cylindrical matrices and films prepared from a series of sequenced and random PLGAs were subjected to hydrolysis in a pH 7.4 buffer at 37 °C. Swelling ranged from 107% for the random racemic PLGA with a 50:50 ratio of lactic (L) to glycolic (G) units to 6% for the sequenced alternating copolymer poly LG. Erosion followed an inverse trend with the random 50:50 PLGA showing an erosion half-life of 3-4 weeks while poly LG required ca. >10 weeks. Stereosequence was found to play a large role in determining swelling and erosion; stereopure analogs swelled less and were slower to lose mass. Molecular weight loss followed similar trends and increases in dispersity correlated with the onset of significant swelling. The relative proportion of rapidly cleavable G-G linkages relative to G-L/L-G (moderate) and L-L (slow) correlates strongly with the degree of swelling observed and the rate of erosion. The dramatic sequence-dependent variation in swelling, in the absence of a parallel hydrophilicity trend, suggest that osmotic pressure, driven by the differential accumulation of degradation products, plays an important role.
Collapse
Affiliation(s)
| | - Devin J Swiner
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Kerri R Bell
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Morgan V Fedorchak
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA 15260, USA; Department of Ophthalmology, University of Pittsburgh, Pittsburgh, PA 15260, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA; Fox Center for Vision Restoration, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Steven R Little
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA 15260, USA; Department of Ophthalmology, University of Pittsburgh, Pittsburgh, PA 15260, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15260, USA; Department of Immunology, University of Pittsburgh, Pittsburgh, PA 15260, USA; Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Tara Y Meyer
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA.
| |
Collapse
|