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The structures, water stabilities and photoluminescence properties of two types of iodocuprate(i)-based hybridsElectronic supplementary information (ESI) available: Crystallographic data, additional structural figures and descriptions, TGA curves, IR spectra, and PXRD patterns. CCDC 1573918-1573923 for 1-6. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c7dt04558a
Erscheinungsjahr
2018-02
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Although great progress has been made in hybrid iodocuprates(
i
) as lighting phosphors, the effects of aromatic and aliphatic structure directing agents (SDAs) on their water stability, structure and photoluminescence (PL) properties are still not clear. Herein, aromatic N-heterocyclic 1,2-di(4-pyridyl)ethylene (dpe), aliphatic N-heterocyclic 1,8-diazabicyclo[5.4.0]undec-7-ene (dbu) and
N
-aminoethylpiperazine (app) were selected to be SDAs to construct two types of hybrid iodocuprates(
i
)
via
a facile
in situ
approach. Aromatic dpe-derived cations are successfully directed to form (Me
2
dpe)(CuI
3
) (
1
), (Me
2
dpe)
n
(Cu
4
I
6
)
n
(
2
), (Et
2
dpe)
2
(Cu
6
I
10
) (
3
), and (H
2
dpe)
n
(Cu
2
I
4
)
n
(
4
). Three of them contain unprecedented inorganic iodocuprate clusters or chains. The aliphatic N-heterocyclic dbu- and app-derivative cations are responsible for the formation of (Hdbu)
n
(Cu
2
I
3
)
n
(
5
) and (H
3
app)
2
(Cu
2
I
6
)·2I·2H
2
O (
6
), which contain a (Cu
2
I
3
)
−
chain and a (Cu
2
I
6
)
4−
binuclear cluster, respectively. For the first time, the influence mechanisms of the water stabilities of iodocuprate-based PL materials were disclosed, by analyzing the possible interactions between SDAs and water molecules.
1-2
are PL silent due to their "self-quenching effect".
3, 4 and
5
exhibit bright red, orange and yellow solid-state PL emissions at room temperature respectively, originating from the charge transfer between inorganic iodocuprate species and organic N-heterocycles. The co-template approach leads to multiple charge transfers in
6
, which features a tunable PL behavior from bluish green to white by varying the excitation light, and has a quantum yield up to 43% (the highest value among hybrid iodocuprates containing (Cu
2
I
6
)
4−
clusters). The comparative study not only helps us to rationally synthesize iodocuprate-based PL materials with enhanced performance, but also provides a new method to obtain wavelength-dependent PL materials.
The effects of aromatic and aliphatic cations on the structure, water stability and photoluminescence of iodocuprate(
i
)-based materials were disclosed.
Sprache
–
Identifikatoren
ISSN: 1477-9226
eISSN: 1477-9234
DOI: 10.1039/c7dt04558a
Titel-ID: cdi_rsc_primary_c7dt04558a
Format
–
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