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Monodisperse Poly(triacetylene) Rods: Synthesis of a 11.9 nm Long Molecular Wire and Direct Determination of the Effective Conjugation Length by UV/Vis and Raman Spectroscopies
Author(s) -
Martin Rainer E.,
Mäder Thomas,
Diederich François
Publication year - 1999
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19990315)38:6<817::aid-anie817>3.0.co;2-r
Subject(s) - monomer , raman spectroscopy , dispersity , conjugated system , materials science , rod , crystallography , chemistry , polymer , polymer chemistry , optics , medicine , physics , alternative medicine , pathology , composite material
With 16 C−C double and 32 C−C triple bonds and a length of 11.9 nm, the hexadecameric poly(triacetylene) (PTA) of type 1 is currently the longest linear fully π‐conjugated molecular wire that does not contain aromatic repeat units. A series of PTA oligomers 1 extending from monomer to hexadecamer was prepared by a rapid and efficient statistical deprotection–oligomerization sequence; the effective conjugation length at which saturation of molecular properties occurs was determined as n =10 ( n =number of monomeric units) by both UV/Vis and Raman spectroscopies.