Sensing Application — Monovalent K, Cs, Tl, and Ag nitrosodicyanomethanides: Completely different 3D networks with useful properties of luminescent materials and nonelectric sensors for gases†

3 measurement groups · 5 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

solid-state photoluminescence response after gas exposure in vacuum/gas cell

Photoluminescence and fluorescence spectroscopy

Ag{ONC(CN)2} bright deep-yellow microcrystalline powder · Powder

Dry Ag{ONC(CN)2} powder exposed to H2, CO, NO, C2H2, C2H4, NH3, and SO2; cell pre-evacuated to 0.1 Torr and filled from gases collected at about 800 Torr; PL monitored at lambda_exc = 300 nm.

Temperature: ambient / room temperature
Atmosphere: gas exposure followed by pumping/dry air and visible-light exposure
Geometry: powder covering 2 cm2 area in aluminium chamber with quartz windows and stopcock
Context: pristine powder before gas exposure
Measurement source: p003 / journal page 2373 · Photophysical Measurements · Figures 11-13; SI S2-S3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
gas-induced PL decrease and visible-light photosensitisationMarked as a best value within this paper	H2, NO, CO, C2H2, and C2H4 irreversibly decrease photoluminescence and sensitise surface to visible-light darkening	—	—	Text Qualitative	p011 / journal page 2381 · Solid-State Photoluminescence of Ag and Tl Complexes in the Presence of Gases · Figures 11-13
NH3 photoluminescence quenching	NH3 quickly, within seconds, irreversibly quenches photoluminescence	—	—	Text Qualitative	p011 / journal page 2381 · Solid-State Photoluminescence of Ag and Tl Complexes in the Presence of Gases
SO2 photoluminescence decrease	about 8% decrease in PL intensity	—	approximate	Text Approximate	p011 / journal page 2381 · Solid-State Photoluminescence of Ag and Tl Complexes in the Presence of Gases

solid-state photoluminescence response after gas exposure in vacuum/gas cell

Photoluminescence and fluorescence spectroscopy

Tl{ONC(CN)2} dark-orange prisms / fine powder · Powder

Dry Tl{ONC(CN)2} powder exposed to H2, SO2, NH3, NO, CO, C2H2, and C2H4 under the gas-cell protocol.

Temperature: ambient / room temperature
Atmosphere: gas exposure
Geometry: powder covering 2 cm2 area in aluminium chamber with quartz windows and stopcock
Context: pristine powder before gas exposure
Measurement source: p011 / journal page 2381 · Solid-State Photoluminescence of Ag and Tl Complexes in the Presence of Gases

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Tl gas exposure PL response	No appreciable change in photoluminescence after exposure to H2, SO2, NH3, NO, CO, C2H2, and C2H4	—	—	Text Qualitative	p011 / journal page 2381 · Solid-State Photoluminescence of Ag and Tl Complexes in the Presence of Gases

photostability test under low-pressure Hg lamp at 254 nm

Ag{ONC(CN)2} bright deep-yellow microcrystalline powder · Powder

Dried Ag{ONC(CN)2} powder spread on white cardboard under a 1 cm2 mask; lamp 2 cm from sample; photographs every 30 min.

Temperature: 296
Atmosphere: open air
Geometry: 1 cm2 exposed powder area, about 25 mg sample
Context: pristine powder
Measurement source: p003 / journal page 2373 · Photophysical Measurements · Figure 10

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
UV exposure energy density with small colour change	81 J absorbed by 1 cm2 surface area	—	—	Text Rounded Reported	p011 / journal page 2381 · Photostability Studies · Figure 10