title: Novel cookie-with-chocolate carbon dots displaying extremely acidophilic high luminescence.
abstract: A fluorescent carbon dot with a cookie-with-chocolate film structure (about 5 × 5 μm(2)) showed a high fluorescence quantum yield (61.12%) at low pH. It was hydrothermally synthesized from l-serine and l-tryptophan. The formation mechanism of the film with carbon dots (CDs) was investigated. The film structure was formed by hydrogen bonding and π-π stacking interactions between aromatic rings. The strong blue fluorescence of the CDs increased under strong acidic conditions owing to the changes in the N-groups. These cookie-like CDs are attractive for their potential use as effective fluorescent probes for the sensitive detection of aqueous H(+) and Fe(3+).
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China. byangchem@jlu.edu.cn.
authors.forename: Siyu
authors.initials: S
authors.lastname: Lu
authors.forename: Xiaohuan
authors.initials: X
authors.lastname: Zhao
authors.forename: Shoujun
authors.initials: S
authors.lastname: Zhu
authors.forename: Yubin
authors.initials: Y
authors.lastname: Song
authors.forename: Bai
authors.initials: B
authors.lastname: Yang