Interwoven
Molecular Chains Obtained by Ionic Self-Assembly of Two Iron(III)
Porphyrins with Opposite and Mismatched Charges
Posted on 2019-09-08 - 17:03
We
report ionic self-assembly of positively charged FeIIImeso-tetra(N-methyl-4-pyridyl) porphyrin
(FeIIINMePyP) with negatively charged FeIIImeso-tetra(4-sulfonatophenyl) porphyrin (FeIIITPPS4), leading to the formation of flower-like nanostructures
composed of unprecedented three-dimensional (3D) entangled chains
of porphyrin dimers. Molecular dynamics (MD) simulations show that
the 3D entanglement of porphyrin chains closely correlates to mismatched
charges present in porphyrin dimers like [FeIII(H2O)2NMePyP]5+/[FeIII(H2O)2TPPS4]3– that requires
extra interactions or entanglement with neighboring ones to achieve
electric neutrality. Interestingly, the interwoven chains bring in
excellent thermal stability as evidenced by well maintenance of the
flower-like morphology after pyrolysis at 775 °C in argon, which
is in good agreement of high-temperature MD simulations. Meanwhile,
heat treatment of the flower-like porphyrin nanostructure leads to
the formation of a non-noble metal electrocatalyst (NNME) with largely
inherited morphology. This exemplifies a new approach by combining
ionic self-assembly with subsequent pyrolysis for the synthesis of
NNMEs with desired control over the morphology of template-free NNMEs
that has rarely been achieved prior to this study. Furthermore, our
electrocatalyst exhibits excellent activity and durability toward
oxygen reduction reaction as well as much better methanol tolerance
compared with commercial Pt/C in alkaline solutions.
CITE THIS COLLECTION
DataCiteDataCite
3 Biotech3 Biotech
3D Printing in Medicine3D Printing in Medicine
3D Research3D Research
3D-Printed Materials and Systems3D-Printed Materials and Systems
4OR4OR
AAPG BulletinAAPG Bulletin
AAPS OpenAAPS Open
AAPS PharmSciTechAAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität HamburgAbhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)ABI Technik (German)
Academic MedicineAcademic Medicine
Academic PediatricsAcademic Pediatrics
Academic PsychiatryAcademic Psychiatry
Academic QuestionsAcademic Questions
Academy of Management DiscoveriesAcademy of Management Discoveries
Academy of Management JournalAcademy of Management Journal
Academy of Management Learning and EducationAcademy of Management Learning and Education
Academy of Management PerspectivesAcademy of Management Perspectives
Academy of Management ProceedingsAcademy of Management Proceedings
Academy of Management ReviewAcademy of Management Review
Xie, Yan; Zhong, Qinglu; Lv, Yang; Li, Jia; Hao, Zhiqiang; Tang, Chizhou; et al. (2019). Interwoven
Molecular Chains Obtained by Ionic Self-Assembly of Two Iron(III)
Porphyrins with Opposite and Mismatched Charges. ACS Publications. Collection. https://doi.org/10.1021/acsami.9b07460