#macromolecules

BioMassSpec

@realbiomassspec.bsky.social

1 week ago

Determination of Copolymer Block-Length Distributions Using Fragmentation Data Obtained from Tandem Mass Spectrometry The block-length distribution (BLD) of polyamide and polyurethane copolymers was determined from mass spectrometry (MS) data. While nuclear magnetic resonance (NMR) traditionally determines the number-average block length, this work demonstrates that MS/MS is a viable option for the characterization of the distribution. An algorithm was implemented and modified to accurately determine copolymer BLDs from fragmentation data. The algorithm incorporates preferences in bond fragmentation. Evaluation of the algorithm encompassed the use of polyamide and polyurethane model systems. In both scenarios, the algorithm successfully derived BLDs, that corresponded well with the average block lengths obtained with 13C NMR. The newly developed algorithm enabled the characterization of BLDs based on MS/MS data. Typical trends in BLDs corresponding to distinct synthesis methods were discernible. These BLDs offer uniquely detailed insights into copolymer chemistry, potentially elucidating variations in functional properties of copolymers despite overall identical compositions.

Determination of Copolymer Block-Length Distributions Using Fragmentation Data Obtained from Tandem Mass Spectrometry #Macromolecules pubs.acs.org/doi/10.1021/...

BioMassSpec

@realbiomassspec.bsky.social

1 week ago

Reference-Free Quantitative Mass Spectrometry Enables Sequencing of Resist Copolymers and Reveals Sequence-Dependent Deprotection Sensitivity The influence of monomer sequence in resist polymers on line-edge roughness (LER) has long remained elusive in semiconductor lithography. Although the arrangement of degradable and nondegradable monomers should affect polymer solubility in developer solutions, the lack of sequencing methods has prevented analysis of sequence–LER correlations. Here, we present a sequencing approach for resist polymers using pyrolysis mass spectrometry (pyrolysis-MS), which quantifies short-sequence frequencies from pyrolyzed oligomer fragments. Methacrylate-based resist polymers, however, undergo depolymerization and side chain cleavage, generating fragments too small to retain sequence information. Nevertheless, we found these instabilities themselves are sequence-dependent, as shown by computational modeling, encoding sequence information in decomposition temperature profiles. By exploiting both mass- and temperature-domains, our strategy enables sequencing of resist copolymers previously considered inaccessible. Moreover, sequence-dependent side chain instabilities imply that resist responsiveness in deprotection processes may also depend on sequence. The proposed sequencer offers a path to unravel the long-standing sequence–LER relationship.

Reference-Free Quantitative Mass Spectrometry Enables Sequencing of Resist Copolymers and Reveals Sequence-Dependent Deprotection Sensitivity #Macromolecules pubs.acs.org/doi/10.1021/...

BioMassSpec

@realbiomassspec.bsky.social

1 week ago

Synthesis and Molecular Characterization of Pyrene-Containing Copolymers as Potential MALDI-TOF MS Matrices Due to its exceptional sensitivity, accuracy, and speed, matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry has emerged as a vital analytical tool, especially for...

Synthesis and Molecular Characterization of Pyrene-Containing Copolymers as Potential MALDI-TOF MS Matrices #Macromolecules pubs.acs.org/doi/10.1021/...

ACS PMSE Division

@acspmse.bsky.social

1 month ago

📣 Insightful editorial in Macromolecules on the role of community, leadership, and innovation in advancing polymer science.

🔗 pubs.acs.org/doi/full/10....

#Macromolecules #PolymerScience #ACS

Department of Physical and Macromolecular Chemistry

@kfmch.bsky.social

3 months ago

On this day, we commemorate the founding of the Department of Physical and Macromolecular Chemistry by Jaroslav Heyrovský - to many more years of science and discovery!

#science #chemistry #physics #macromolecules

EZ-C Group

@ezc-group.bsky.social

3 months ago

Congratulations🎊 to Ollie, Chloe, and Lea for their paper (dx.doi.org/10.1021/acs....) accepted in #Macromolecules, work in collaboration with the group of Amit Kumar on disulfide-containing self-healing polyamides. @standrewschem.bsky.social @standrewsosc.bsky.social #PhotoReAct ⚗️🧪

Department of Physical and Macromolecular Chemistry

@kfmch.bsky.social

4 months ago

Welcome to Physical & Macromolecular Chemistry! ⚛️🧪😎
Where science isn’t just observed… it’s experienced ✨

#PhysicalChemistry #Macromolecules #MolecularScience #MaterialsScience #ChemicalResearch
#ScienceVibes #ChemistryLife #MolecularMagic #DiscoverChemistry #ScienceExplorers

Christine Luscombe

@luscombeoist.bsky.social

5 months ago

Issue 40 of Polymer Chemistry is now online. Featuring new approaches to polymerizations, high-performance adhesives, polymers for solar cells and fuel cells.

Read more at: pubs.rsc.org/en/journals/...

#Polymers #Macromolecules #Chemsky #OPV #fuelcells #adhesives @rsc.org

Computational and Structural Biotechnology Journal (CSBJ)

@csbj.org

5 months ago

A labeled dataset for AI-based cryo-EM map enhancement. Computational and Structural Biotechnology Journal, DOI: https://doi.org/10.1016/j.csbj.2025.06.041

🤖 What happens when we train AI to see through the noise of cryo-EM imaging?

🔗 A labeled dataset for AI-based cryo-EM map enhancement. Computational and Structural Biotechnology Journal, doi.org/10.1016/j.cs...

📚 CSBJ: www.csbj.org

#AI #CryoEM #StructuralBiology #Macromolecules #Bioinformatics

michael

@proseandpassion.mastodon.social.ap.brid.gy

5 months ago

What is the significance of the evolution from chiral molecular macrocycles to chiral topological macrocycles? A novel strategy was designed for guiding supramolecular macrocycles into nanoscale chiral topological toroids, establishing hierarchical self-assembly pathways for advanced chiroptical materials

26-Sep-2025
What is the significance of the evolution from #chiral molecular #macrocycles to chiral topological macrocycles?

https://www.eurekalert.org/news-releases/1099922

#science #chemistry #selfAssembly #nanoworld #macromolecules '#supramolecularChemistry #chirality

CIC nanoGUNE

@nanogune.bsky.social

6 months ago

🌎 New #scientificpublication at #MACROMOLECULES
📍Unraveling the Particle Morphology of ABS Polymer Latexes by 3D STEM
👩‍🔬🧑‍🔬 A. Agirre, E. Modin, A. Chuvilin, M. Aguirre and J. Leiza
👉 https://f.mtr.cool/biinotrdkd

Displaycia Journals

@displaycia.bsky.social

10 months ago

Macromolecules Advancement | Global Journal of Materials Chemistry (GJMC) | Displaycia | Submit Your Manuscript: Submission is OPEN NOW!

📢 Macromolecules Advancement!

📌 Follow us for more updates: @displaycia.bsky.social

🔗 Read more: displaycia.com/mater...

🔗 Get in touch with us: displaycia.com/mater...

#MaterialsChemistry #Displaycia #Macromolecules #ScientificResearch #Advancement #ManuscriptSubmission #Development

Universität Bern

@unibe.ch

1 year ago

Astronomers clarify how organic macromolecules are formed An international team of researchers led by the University of Bern has used observation-based computer modelling to find an explanation for how macromolecules can form in a short time in disks of gas ...

🔭 A team led by #unibern has discovered how organic #macromolecules can form in #dust traps around young #stars. This could help to understand how conditions for #life can develop around #exoplanets and stars 🌌: sohub.io/mtug.

@nienkemarel.bsky.social

Olga Koshkina

@olga-colloids.bsky.social

2 years ago

Hello new world, looks like I finally created an account here. Follow me if you are interested in #science, #polymers, #macromolecules, #colloids, #nanoparticles, #imaging, #chemsky, #NMRchat