Missling, C.U., Sünkel, K., Langhals, H. and Beck, W. (2017) Organometallic Lewis Acids, Part CXII. Chiral Carbonyl-Cyclopentadienyl-Triphenylphosphine-Iron and -Ruthenium Complexes with Novel Tertiary Nitriles. [CpM(CO)(PPh₃)(N≡C-CR₁R₂R₃)]+ BF₄- (M = Fe, Ru). Zeitschrift für anorganische und allgemeine Chemie, 643, 1262-1268.
https://doi.org/10.1002/zaac.201700235

has been cited by the following article:

• TITLE: A Sustainable Preparation of Functional Perylenophanes by Domino Metathesis

  AUTHORS: Heinz Langhals, Maximilian Rauscher, Peter Mayer

  KEYWORDS: Optical Materials, Functional Dyes, Fluorescence, Exciton Interaction, Metathesis

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.9 No.2, May 31, 2019

  ABSTRACT: A sustainable four-step synthesis of soluble perylenophanes for applications as fluorescent optical functional materials is presented and even allows upscaling because of starting with technical bulk products. Thus, terminal alkenylnitriles were alkylated reduced to amines, condensed with perylenetetracarboxylic bisanhydride and cyclised to cyclophanes by means of double cross metathesis in yields until 69% of isolated dyes. The first metathesis by means of the second-generation Hoveyda-Grubbs-catalyst brings the remaining reactive olefinic groups close together favouring the ring-closure to the cyclophanes where the locked neighboring of chromophores in a skew arrangement induce strong exciton interactions. The latter cause an increased the Stokes’ separation by means of a moderate hypsochromic shift of light absorption and a stronger bathochromic shift of fluorescence. Various applications such as for lasers, photonics, solar collectors or in analytics are discussed.