# US 12,006,334 B2 · Alkynylplatinum (II) terpyridine system coupled with rhodamine derivative: interplay of aggregation, de-aggregation and ring-opening processes for ratiometric luminescence sensing

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,006,334 B2
- Document ID: US12006334B2
- Status: Granted
- Kind: B2
- Application number: 16/767,807
- Filed: 2018-05-10
- Published: 2021-01-07
- Granted: 2024-06-11
- Earliest claimed: 2018-05-10
- Assignees: South University of Science and Technology of China
- Applicants: South University of Science and Technology of China
- Inventors: Keith Man Chung Wong
- Web page: https://patentgrep.com/patent/US12006334B2

## CPC

- C07F 15/0086: {Platinum compounds}
- C09K 11/06: containing organic luminescent materials
- G01N 21/6428: {Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" (in vivo A61B5/00; immunoassay G01N33/53)}
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- C09K 2211/1077: with oxygen
- C09K 2211/185: of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
- G01N 2021/6439: {with indicators, stains, dyes, tags, labels, marks}
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES

## Abstract

The synthesis and characterization of a platinum (II) terpyridine system tethered with a latent organic dye of rhodamine derivative as colorimetric and fluorescent sensory moiety has been reported to show selective Hg2+ ion sensing behavior. The interplay of aggregation/de-aggregation behavior of the alkynylplatinum(II) terpyridine complex and the ring-opening process of rhodamine derivative has been investigated. The spectral change of aggregation NIR emission at 800 nm and rhodamine fluorescence at 585 nm provides a possible ratiometric luminescence measurement. Morphological studies from TEM and SEM images showing nanospherical structures confirmed the aggregation in the absence of Hg2+ ion.

## Claims

### Claim 1

A complex from a combination of a platinum(II) terpyridine system and a rhodamine derivative with spiroring-opening ability, used for ratiometric fluorescent sensing in a presence of Hg2+;
wherein the complex has a structure of formula II:

### Claim 2 (depends on 1)

The complex according to claim 1, used as a selective Hg2+ probe.

### Claim 3 (depends on 1)

The complex according to claim 1, wherein the complex has a spiroring-opening ability in the presence of Hg2+.

### Claim 4 (depends on 1)

The complex according to claim 1, wherein the complex has a de-aggregation ability in the presence of Hg2+.

### Claim 5 (depends on 3)

The complex according to claim 3, used for indicating UV-Vis absorption and emission spectral changes at a same time.