In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 9, No. 34 ( 2021), p. 11126-11131
Abstract:
Photoluminescence and photochromic pathways are competitive during the exciton-decay processes. To rationally control molecular photoluminescence and photochromic properties, triarylethylene derivatives combining ethynyl and ethynyltrimethylsilane groups, namely TrPEF 2 H and TrPEF 2 TMS, were designed and synthesized in this work. By simply attaching and removing the TMS protecting group, these two molecules can be mutually converted. Detailed photophysical and photochromic investigations revealed that molecules TrPEF 2 H and TrPEF 2 TMS exhibit distinct emissive and photochromic behaviors in the crystalline state: TrPEF 2 H features a pronounced photochromic property and a low photoluminescence quantum yield (PLQY) of 1.5%, whereas a weak photochromic response and a high PLQY of 14.2% were obtained in crystalline TrPEF 2 TMS. The distinguished difference is proposed as due to the introduction of the bulky trimethylsilane moiety in TrPEF 2 TMS, which effectively suppressed the molecular vibrations and photocyclization reactions. Single crystal analyses and theoretical calculations were further carried out to interpret the distinction of the photophysical and photochromic properties in molecules TrPEF 2 H and TrPEF 2 TMS. Furthermore, TrPEF 2 H and TrPEF 2 TMS were applied in a photo-controlled pattern showing reversible on–off switching emission. This design strategy gives the two molecules incomparable advantages in dual-mode signal and surface-involved photoresponsive applications, such as data encryption and information storage.
Type of Medium:
Online Resource
ISSN:
2050-7526
,
2050-7534
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2021
detail.hit.zdb_id:
2702245-6
