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

4materials

4samples

4synthesis routes

12measurements

31results

5claims and caveats

Evidence map

Open a family to keep every result attached to its sample, method and conditions.

Spectroscopy2 measurements12 results →Diffraction Structure3 measurements10 results →Sensing Application3 measurements5 results →Electrical Transport4 measurements4 results →

Author interpretations and caveats

Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.

Application RelevanceSupport assessment: Medium

Ag{ONC(CN)2} is proposed as a battery-less, nonelectric optical sensor material because exposure to H2, CO, NO, C2H2, or C2H4 followed by visible light causes surface darkening and PL intensity loss.

Caveat: The study demonstrates qualitative response and photosensitisation but does not report calibrated detection limits, selectivity metrics, response/recovery curves, or device packaging.

p012 / journal page 2382 · Conclusion · Figures 10-13 · Linked to 2 structured results

Structure Property LinkSupport assessment: Medium

Solid-state diffusion-reflectance band positions shift bathochromically with increasing metal atomic weight/electron count in the M{ONC(CN)2} series.

Caveat: Numerical SI fit values were read from rendered pages; Cs is discussed in the main spectrum but not included in the SI Gaussian fit pages.

p010 / journal page 2380 · UV-Visible Spectra · Figure 8; SI S15 · Linked to 6 structured results

Structure Property LinkSupport assessment: High

The same 1:1 M{ONC(CN)2} stoichiometry gives different 3D structures: ionic Cs, covalent Ag, and intermediate Tl.

Caveat: K was synthesised and measured but no new crystal structure for K is reported in this article.

p006 / journal page 2376 · Structures of Synthesized M+ Nitrosodicyanomethanides · Figures 1, 4, 6 · Linked to 5 structured results

Structure Property LinkSupport assessment: High

Tl{ONC(CN)2} exhibits structured metal-based red photoluminescence in the 680-800 nm range that depends on excitation wavelength.

Caveat: The exact fitted peak centres are read from rendered SI fit tables.

p001 / journal page 2371 · Abstract · Figure 9; SI S16-S19 · Linked to 3 structured results

Transport MechanismSupport assessment: High

The lower conductance of Ag{ONC(CN)2} in DMSO is interpreted as lesser dissociation, consistent with covalent Ag-ligand bonding; K and Cs behave as ionic 1:1 electrolytes and Tl is intermediate.

Caveat: Conductance was measured only for 1 mM DMSO solutions; it does not establish solid-state electronic conductivity.

p009 / journal page 2379 · Solution Electrical Conductivity · Table 5 · Linked to 4 structured results

Material identities

Names and aliases are kept exactly within the paper’s own identity model.

Material	Composition	Structure context	Source
silver(I) nitrosodicyanomethanide	Ag{ONC(CN)2} / C3N3OAgAg(I) centres · nitrosodicyanomethanide anion, ONC(CN)2-	3D · PristineCovalent 3D interwoven coordination polymer; the anion is tetradentate and bridges through three N donors and one O donor around distorted tetrahedral Ag(I).	p006 / journal page 2376 · Results and Discussion; Ag{ONC(CN)2} · Figures 1 and 2
cesium nitrosodicyanomethanide	Cs{ONC(CN)2} / C3N3OCsCs+ cations · nitrosodicyanomethanide anion, ONC(CN)2-	3D · PristineIonic 3D network; Cs centre has 10 electrostatic contacts and an irregular coordination polyhedron.	p007 / journal page 2377 · Results and Discussion; Cs{ONC(CN)2} · Figure 4; SI S8
potassium nitrosodicyanomethanide	K{ONC(CN)2} / C3N3OKK+ cations · nitrosodicyanomethanide anion, ONC(CN)2-	unknown · PristinePotassium nitrosodicyanomethanide salt included in IR, solid-state reflectance, photoluminescence, and solution-conductance measurements; no new single-crystal structure is reported.	p001 / journal page 2371 · Abstract
thallium(I) nitrosodicyanomethanide	Tl{ONC(CN)2} / C3N3OTlTl(I) centres · nitrosodicyanomethanide anion, ONC(CN)2-	3D · Pristine3D framework with alternating Tl2O2 and Tl2N2 rhombs; bonding is intermediate between ionic Cs and covalent Ag cases.	p007 / journal page 2377 · Results and Discussion; Tl{ONC(CN)2} · Figures 5 and 6; SI S9-S10

Sample register

Sample form, processing state and composition status define the context for measurements.

Show 4 sample records

Sample	Form and role	Processing and geometry	Source
Ag{ONC(CN)2} bright deep-yellow microcrystalline powderresearch_0644__mat__mat_ag_ndm	Powder · Target Sample · Pristine Framework	Bright deep-yellow microcrystalline powder; dried under high vacuum for UV/gas studies; hot-water-grown single crystals for XRD.	p005 / journal page 2375 · Synthesis · Figures 1, 2, 10-13
Cs{ONC(CN)2} yellow-orange crystals / fine powderresearch_0644__mat__mat_cs_ndm	Powder · Target Sample · Pristine Framework	Yellow-orange crystals; single crystals for XRD; fine powder/solution used for measurements.	p005 / journal page 2375 · Synthesis · Figures 3 and 4
K{ONC(CN)2} bright yellow crystals / fine powderresearch_0644__mat__mat_k_ndm	Powder · Target Sample · Pristine Framework	Bright yellow crystals; fine powder/solution used for measurements.	p005 / journal page 2375 · Synthesis
Tl{ONC(CN)2} dark-orange prisms / fine powderresearch_0644__mat__mat_tl_ndm	Powder · Target Sample · Pristine Framework	Dark-orange prisms suitable for X-ray analysis; fine powder for photoluminescence/gas tests and DMSO solution for conductance.	p004 / journal page 2374 · Synthesis · Figures 5, 6, 9