AI Article Synopsis
- The study investigates the structure and behavior of a semirigid conjugated polymer (DP10-PPV) in chloroform and toluene using various scattering techniques.
- In chloroform, the polymer adopts a more extended conformation with higher values for radius of gyration, persistence length, and second virial coefficient, whereas toluene leads to significant clustering into microgels.
- Compared to a similar polymer with shorter side chains, the aggregates formed in toluene are weaker and more easily disrupted due to less pi-pi interaction caused by the longer decyl side chains.
Article Abstract
The conformational structure and the interchain aggregation behavior of a semirigid conjugated polymer bearing a decyl side chain, poly(2,3-diphenyl-5-decyl-1,4-phenylenevinylene) (DP10-PPV), in solutions with chloroform and toluene have been investigated by means of small-angle neutron scattering (SANS), static light scattering (SLS) and dynamic light scattering (DLS). The radius of gyration, persistence length, and the second virial coefficient of the polymer in dilute solution as determined by SLS were higher in chloroform than in toluene; consequently, the polymer assumed a more extended wormlike chain conformation in the former. The difference in the strength of interaction in the two solvents gave rise to contrasting aggregation behavior of the polymer in the semidilute regime. While only a minor fraction of the polymer underwent segmental association in chloroform, a considerable fraction of it formed clusters (microgels) with several micrometers in size in toluene. These clusters were further found to consist of sheetlike nanodomains. Compared with the DP-PPV bearing a shorter hexyl side chain, DP6-PPV, the aggregates of DP10-PPV in toluene were weaker as they could be easily disrupted by moderate heating. This was attributed to a lack of strong pi-pi interaction between the DP10-PPV segments due to the greater steric hindrance imposed by the longer decyl side chains.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/la803339f | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Experiences of African women who migrate to a developed country and encounter intimate partner violence: a systematic review of qualitative evidence.
JBI Evid Synth
January 2025
School of Nursing and Midwifery, University of Newcastle, Newcastle, New South Wales, Australia.
Objective: The objective of this review was to synthesize the available evidence on the experiences of African women who migrated to a developed country and encountered intimate partner violence (IPV).
Introduction: IPV is a significant public health issue, and migrant women living in developed countries are particularly vulnerable to IPV, experiencing disproportionately higher rates of IPV. Understanding the experiences of these women can inform health policy and decision-making in clinical practice to minimize IPV.
Recent Advances in Polymorphism of Organic Solar Cells.
Small
January 2025
School of Electronics and Information, Northwestern Polytechnical University, 1 Dongxiang Road, Xi'an, 710129, China.
As organic solar cells (OSCs) achieve notable advancements, a significant consensus has been highlighted that the device performance is intricately linked to the active layer morphology. With conjugated molecules being widely employed, intermolecular interactions exert substantial influence over the aggregation state and morphology formation, resulting in distinct molecular packing motifs, also known as polymorphism. This phenomenon is closely associated with processing conditions and exerts a profound impact on functional properties.
View Article and Find Full Text PDFUrban-rural disparities in the association between social trust patterns and changes in depressive symptoms: longitudinal evidence from an elderly Chinese population.
BMJ Open
December 2024
Department of Health Policy and Management, School of Public Health, Peking University, Beijing, China
Objective: To examine the relationship between social trust and depressive symptoms among China's elderly, placing special emphasis on the disparities between urban and rural settings.
Design: We employed latent profile analysis to categorise individual patterns of social trust. Subsequently, multiple linear regression analysis was employed to determine if there was an association between these identified social trust patterns and depressive symptoms.
HN1 Functions in Protein Synthesis Regulation via mTOR-RPS6 Axis and Maintains Nucleolar Integrity.
Cell Prolif
January 2025
Faculty of Engineering, Department of Bioengineering, Cancer Biology Laboratory, Ege University, Bornova, Izmir, Turkey.
Haematological and Neurological Expressed 1 (HN1) is an oncogene for various cancers and previously has been linked with centrosome clustering and cell cycle pathways. Moreover, HN1 has recently been reported to activate mTOR signalling, which is the regulator of ribosome biogenesis and maintenance. We explored the role of HN1 in mTOR signalling through various gain- and loss-of-function experiments using biochemical approaches in different cell lines.
View Article and Find Full Text PDFThe main sources of molecular organization in the cell. Atlas of self-organized and self-regulated dynamic biostructures.
Prog Biophys Mol Biol
January 2025
Department of Cell Biology and Histology, Faculty of Medicine and Nursing, University of the Basque Country, UPV/EHU, Leioa 48940, Spain.
One of the most important goals of contemporary biology is to understand the principles of the molecular order underlying the complex dynamic architecture of cells. Here, we present an overview of the main driving forces involved in the cellular molecular complexity and in the emergent functional dynamic structures, spanning from the most basic molecular organization levels to the complex emergent integrative systemic behaviors. First, we address the molecular information processing which is essential in many complex fundamental mechanisms such as the epigenetic memory, alternative splicing, regulation of transcriptional system, and the adequate self-regulatory adaptation to the extracellular environment.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!