White light emission from quantum dot and a UV-visible emitting Pd-complex on its surface

Abstract

Near white light emission (CIE 0.35, 0.29) has been achieved as a combination of intraligand transition, aggregate induced emission and dopant emission followed by surface complexation on Qdot surface.

Tunable excitation properties of ZnCdS:Mn/ZnS quantum dots for cancer imaging

“…[4,5] However, the toxicity of Cd-based QDs has limited their further biomedicine application, especially when directly related to human health. [6,7] Recently, doped QDs have been explored as a viable alternative to the Cd-based QDs, due to their low toxicity to biological tissue. Generally, ZnSe or ZnS as the host and transition ions (Mn 2+ or Cu 2+ ) as the emissive center have been used in doped QDs.…”

“…However, this method has strict requirements for preparation conditions, such as high temperature, high pressure and the use of organic reagents, which are expensive and can affect the surrounding environment. In addition, the preparation of oil-phase QDs capped with organic ligands has encountered many technical problems such as poor biocompatibility, [6,7,10] therefore these methods were not suitable for fluorescence labeling and tracing in in vivo and in vitro experiments. The second method is water-phase synthesis, which usually involves low temperature and Abbreviations used: CB, conduction band; PBS, phosphate-buffered saline; PL, photoluminescence; QY, quantum yield; TEM, transmission electron microscope; UV, ultraviolet; VB, valence band; XRD, X-ray diffraction.…”

“…Traditional Cd‐based QDs have been synthesized successfully and form a class of mainstream fluorescent materials . However, the toxicity of Cd‐based QDs has limited their further biomedicine application, especially when directly related to human health . Recently, doped QDs have been explored as a viable alternative to the Cd‐based QDs, due to their low toxicity to biological tissue.…”

Materiales basados en especies de Pd soportadas sobre matrices sólidas como catalizadores eficientes para reacciones de interés en química fina

“…De esta manera se pudo determinar que las señales de Phen y [Pd-Phen] aparecen a menor longitud de onda que las de L1 y [C1], debido a que estos dos últimos compuestos poseen un mayor número de anillos aromáticos en su estructura, lo que implica una mayor conjugación del sistema y hace que sus señales aparezcan a valores de mayor longitud de onda. [228][229][230] Por otra parte, el hecho de que el Pd se compleje con los ligandos hace que las bandas de los complejos aparezcan a mayor longitud de onda que la de sus respectivos ligandos. 230,231 Capítulo 6.…”

“…[228][229][230] Por otra parte, el hecho de que el Pd se compleje con los ligandos hace que las bandas de los complejos aparezcan a mayor longitud de onda que la de sus respectivos ligandos. 230,231 Capítulo 6. Inmovilización de complejos de Pd sobre materiales de tipo grafeno y estudio de su actividad catalítica en la semi-hidrogenación de alquinos 357 La estructura de los complejos [Pd-Phen] y [C1] se confirmó mediante espectrometría de masas de alta resolución, que logró detectar las especies [M-OAc] + , generadas por la Capítulo 6.…”