Hybrids of gold nanoparticles and oligo(p-phenyleneethynylene)s end-functionalized with alkynylruthenium groups: Outstanding two-photon absorption in the second biological window

Date

2020-07-16

Authors

Quintana, Cristóbal
Morshedi, Mahbod
Du, Jun
Morrall, Joseph P. L.
Zaręba, Jan K.
Samoc, Marek
Cifuentes, Marie P.
Humphrey, Mark

Journal Title

Journal ISSN

Volume Title

Publisher

Springer Verlag

Abstract

Oligo(p-phenyleneethynylene)s (OPEs) end-capped with (alkynyl)bis(diphosphine)ruthenium and thiol/thiolate groups stabilize ca. 2 nm diameter gold nanoparticles (AuNPs). The morphology, elemental composition and stability of the resultant organometallic OPE/AuNP hybrid materials have been defined using a combination of molecular- and nano-material chacterization techniques. The hybrids display long-term stability in solution (more than a month), good solubility in organic solvents, reversible ruthenium-centered oxidation, and transparency beyond 800 nm, and possess very strong nonlinear absorption activity at the first biological window, and unprecedented two-photon absorption activity in the second biological window (σ2 up to 38,000 GM at 1,050 nm).

Description

Keywords

gold nanoparticles, inorganic materials, metal alkynyl complexes, nonlinear optics, organometallics

Citation

Source

Nano Research

Type

Journal article

Book Title

Entity type

Access Statement

Open Access

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