Luminescence of samarium(iii) bis-dithiocarbamate frameworks: codoped lanthanide emitters that cover visible and near-infrared domains

Abstract

A porous 3D Sm-S-MOF with the white light emission, and especially for near-infrared (NIR) luminescent barcodes obtained from a single material has been explored.

A Structural Survey of Poly-Functional Dithiocarbamate Ligands and the Aggregation Patterns They Sustain

“…The L 2 di-anions are µ 2 -bridging, chelating two neodymium(III) atoms, each of which is eight-coordinated within a distorted S 8 -cube. In terms of photoluminescence properties, 98 exhibited well-resolved emission bands in the visible and near-infrared regions in comparison with the other materials [83].…”

“…The motivation for studying lanthanide MOFs, LnMOFs, largely revolves around the luminescent properties of these materials [94] in recognition that such materials are relatively unexplored. In this context, a series of tri-valent lanthanides were synthesised, each formulated as {(H 3 O)[Ln(L 2 ) 2 ] 2.5(CH 3 NO 2 ), 1.5(H 2 O)} n for Ln = cerium (97), samarium (98), europium (99), gadolinium (100), terbium (101) [83], and neodymium (102) [84] with all six structures being isostructural; the compounds were synthesised from the reactions of Ln(NO 3 ) 3 .6H 2 O (Ln = Ce, Sm, Eu, Gd, Tb and Nd) with an aqueous solution of Na 2 [L 2 ]. Thus, it is the very last set of structures to be described in this overview that emphasises the potential of poly-functional dithiocarbamate ligands for the construction MOFs.…”

Visible, Near-Infrared, and Dual-Range Luminescence Spanning the 4f Series Sensitized by a Gallium(III)/Lanthanide(III) Metallacrown Structure

“…55 However, these Ln 3+ possess a very unique ability to emit in both the visible and in the NIR ranges. 47,50,56 Such dual-emission features of Ln 3+ are less studied and exploited for coordination compounds [57][58][59][60][61][62] but can lead to, for example, the creation of sophisticated barcode modules [63][64][65][66] , or novel optical imaging applications. [67][68] We have recently reported several series of visible and NIR emitting Ln 3+ /Ga 3+ MCs 3,[5][6]69 and metallocryptates 70 assembled using salicylhydroxamic acid (H3shi) as building blocks.…”

“…47,50,56,62,92 Additionally, if the dual emission of Sm 3+ and Dy 3+ are more frequently observed and quantified, 3, 5-6, 46-47, 57, 60, 65, 67-68, 85, 93-94 studies that involve evaluation of such properties from Pr 3+ , Ho 3+ , Er 3+ and Tm 3+ in coordination compounds are very rare. 58-59, 61, 64, 95 However, unique bands arising from Ln 3+ of different natures and spanning the whole visible and NIR ranges with various luminescence lifetimes and emission profiles are essential for multicolor and multiplex imaging, [96][97] and could lead to the development of advanced materials such as sophisticated barcode modules [63][64][65] or other interesting optical imaging applications. [67][68] It is generally accepted that the lowest in energy triplet state of chromophoric ligands play a predominant role in the sensitization of Ln 3+ although singlet and charge transfer (CT) states may also be involved.…”

Exploring color tunable emission characteristics of Eu3+-doped La2(MoO4)3 phosphors in the glass–ceramic form

“…While developing such phosphor materials, doping trivalent lanthanide ions in various hosts is the most preferred strategy due to their sharp emission peaks which arise as a result of electronic transition among 4f orbitals and covering the entire visible to near infrared regions. [2][3][4] Such lanthanidedoped phosphors, which are being used in phosphorconverted LEDs also have high color purity with relatively long lifetime values and result in high quantum yield. At present, the white light in commercial WLEDs is achieved by a combination of Ce:YAG yellow phosphor and blue LED.…”