TY - JOUR

T1 - Investigation of the molecular switching process between spin crossover states of triazole complexes as basis for optical sensing applications

AU - Günther, Axel

AU - Deja, Yves

AU - Kilic, Maximilian

AU - Tran, Kevin

AU - Kotra, Pavan

AU - Renz, Franz

AU - Kowalsky, Wolfgang

AU - Roth, Bernhard

N1 - Funding Information: This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453). Funding from the German Research Foundation DFG (German Research Foundation, Project ID RE 1627/13-1 and RO 3471/23-1) is acknowledged.

PY - 2024/3/11

Y1 - 2024/3/11

N2 - With the advent of the first laser sources and suitable detectors, optical sensor applications immediately also came into focus. During the last decades, a huge variety of optical sensor concepts were developed, yet the forecast for the future application potential appears even larger. In this context, the development of new sensor probes at different scales down to the atomic or molecular level open new avenues for research and development. We investigated an iron based triazole molecular spin-crossover complex changing its absorption characteristics significantly by varying environmental parameters such as humidity, temperature, magnetic or electric field, respectively, with respect to its suitability for a new class of versatile molecular sensor probes. Hereby, besides the investigation of synthesized pure bulk material using different analyzing methods, we also studied amorphous micro particles which were applied in or onto optical waveguide structures. We found that significant changes of the reflection spectra can also be obtained after combining the particles with different types of optical waveguides.The obtained results demonstrate the suitability of the material complex for a broad field of future sensor applications.

AB - With the advent of the first laser sources and suitable detectors, optical sensor applications immediately also came into focus. During the last decades, a huge variety of optical sensor concepts were developed, yet the forecast for the future application potential appears even larger. In this context, the development of new sensor probes at different scales down to the atomic or molecular level open new avenues for research and development. We investigated an iron based triazole molecular spin-crossover complex changing its absorption characteristics significantly by varying environmental parameters such as humidity, temperature, magnetic or electric field, respectively, with respect to its suitability for a new class of versatile molecular sensor probes. Hereby, besides the investigation of synthesized pure bulk material using different analyzing methods, we also studied amorphous micro particles which were applied in or onto optical waveguide structures. We found that significant changes of the reflection spectra can also be obtained after combining the particles with different types of optical waveguides.The obtained results demonstrate the suitability of the material complex for a broad field of future sensor applications.

KW - Molecular switches

KW - Optical sensing

KW - Optical waveguides

UR - http://www.scopus.com/inward/record.url?scp=85187452298&partnerID=8YFLogxK

U2 - 10.1038/s41598-024-56427-1

DO - 10.1038/s41598-024-56427-1

M3 - Article

C2 - 38467722

AN - SCOPUS:85187452298

VL - 14

JO - Scientific reports

JF - Scientific reports

SN - 2045-2322

M1 - 5897

ER -